{"id":17662,"date":"2026-04-25T06:39:31","date_gmt":"2026-04-24T22:39:31","guid":{"rendered":"https:\/\/long-join.com\/?p=17662"},"modified":"2026-04-25T06:39:35","modified_gmt":"2026-04-24T22:39:35","slug":"guide-for-buyers-to-establish-long-term-cooperation-with-photocell-suppliers","status":"publish","type":"post","link":"https:\/\/long-join.com\/ru\/guide-for-buyers-to-establish-long-term-cooperation-with-photocell-suppliers\/","title":{"rendered":"Guide For Buyers To Establish Long-Term Cooperation With Photocell Suppliers"},"content":{"rendered":"
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Guide For Buyers To Establish Long-Term Cooperation With Photocell Suppliers<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0442\u044c<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Buying a photocell\u00a0is not just about finding a low price. It is about finding a supplier you can trust again and again. If the product fails in the field, ships late, or comes with weak documents, the real cost rises fast. That is why smart buyers look at planning, testing, documents, and long-term support before they place large orders. Your outline focuses on that full buying process, from planning to supplier screening to long-term partnership checks.<\/p>

\u00a0<\/p>

For outdoor lighting projects, this matters even more. A buyer may need a simple photocell switch, a rugged \u043d\u0430\u0440\u0443\u0436\u043d\u044b\u0439 \u0444\u043e\u0442\u043e\u044d\u043b\u0435\u043c\u0435\u043d\u0442 \u0434\u0430\u0442\u0447\u0438\u043a \u043e\u0441\u0432\u0435\u0449\u0435\u043d\u043d\u043e\u0441\u0442\u0438<\/u><\/a>, or a more advanced control interface such as a \u041d\u0415\u041c\u0410<\/u><\/a>\u00a0\u0440\u043e\u0437\u0435\u0442\u043a\u0430<\/u><\/a>\u00a0\u0438\u043b\u0438 \u0436\u0430\u0433\u0430 \u0433\u043d\u0435\u0437\u0434\u043e<\/u><\/a>. Long-Join presents itself as a long-running manufacturer focused on NEMA and Zhaga connector products for overseas lighting buyers, which makes it a useful case study for this topic.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\"\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\t\t\t\t\t\t\t\t\t\t\t
\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440 \u043e\u0441\u0432\u0435\u0449\u0435\u043d\u0438\u044f \u0441\u0435\u0440\u0438\u0438 longjoin<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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How Should Buyers Build A Clear Procurement Plan First?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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A good buying relationship starts before the first email to a supplier. The buyer needs to define what the project really needs.<\/p>

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It also helps to decide early whether the project needs only a basic light sensor\u00a0product or something more advanced for smart control. Some jobs only need dusk-to-dawn switching. Others need dimming, smart monitoring, or interfaces such as NEMA or Zhaga. Long-Join\u2019s product structure reflects this difference, with separate lines for photocontrol devices, NEMA receptacles<\/u><\/a>, and Zhaga series products.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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What Should Be Fixed In A Procurement Plan?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\u042d\u043b\u0435\u043c\u0435\u043d\u0442<\/b><\/strong><\/p><\/td>

What Buyers Should Define<\/b><\/strong><\/p><\/td>

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Product Type<\/p><\/td>

Basic photocell, socket, or smart control part<\/p><\/td>

Prevents wrong quotation<\/p><\/td><\/tr>

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Sample date, test date, bulk order date<\/p><\/td>

Helps avoid late delivery<\/p><\/td><\/tr>

Quantity<\/p><\/td>

Trial volume and bulk volume<\/p><\/td>

Lets supplier plan capacity<\/p><\/td><\/tr>

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Target price range and cost limits<\/p><\/td>

Saves time in negotiation<\/p><\/td><\/tr>

Technical Need<\/p><\/td>

Voltage, waterproof level, sensitivity, interface<\/p><\/td>

Makes requirements clear<\/p><\/td><\/tr>

Target Market<\/p><\/td>

U.S., EU, or other export market<\/p><\/td>

Affects certification needs<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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how to choose Establish Long-Term Cooperation With Photocell Suppliers<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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How Can Buyers Find Good Photocell Suppliers Without Wasting Time?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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The first step is simple search work. Buyers often start with Google and B2B platforms such as Alibaba. That part is easy. The harder part is filtering out weak suppliers. A polished page is not enough. You need to check whether the supplier has a real product range, real application experience, and signs of stable production.<\/p>

\u00a0<\/p>

Look at whether the supplier explains products clearly. Check if they show standard-based items instead of vague claims. For example, Long-Join has separate public pages for NEMA standard connectors, Zhaga products, and photocell categories, which makes it easier for buyers to see what the company actually offers.<\/p>

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Buyers should also check whether the supplier seems focused. A factory that truly understands photocontrol receptacle\u00a0products and photocell control\u00a0devices will usually explain standards, applications, and compatibility in a more direct way than a trader who sells everything.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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What Should Happen During The First Cooperation Stage?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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The first cooperation should stay practical. Start with samples. The buyer explains the need, and the supplier prepares a sample plan, production schedule, and expected shipping method. Your outline notes a typical sample production lead time of about three to four weeks. That is a reasonable planning point for first-round cooperation and evaluation.<\/p>

\u00a0<\/p>

Once samples are ready, the buyer\u2019s team should check function, waterproof performance, switching sensitivity, and physical strength. This matters because a product can look fine on a page and still fail in real outdoor use. For example, Long-Join emphasizes standards-based connector and control products and highlights compliance claims across different product families, which is useful only if the buyer also verifies the supplied sample and documents.<\/p>

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Then comes the hard part: saying no when needed. If a supplier cannot meet core standards, gives weak answers, or creates trade risk, it is better to stop early than to push forward into a large order.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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What Should Buyers Check In Sample Evaluation?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Check Item<\/b><\/strong><\/p><\/td>

What To Review<\/b><\/strong><\/p><\/td>

Common Risk<\/b><\/strong><\/p><\/td><\/tr>

\u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/p><\/td>

On\/off action, switching response<\/p><\/td>

Product does not work as expected<\/p><\/td><\/tr>

\u0413\u0438\u0434\u0440\u043e\u0438\u0437\u043e\u043b\u044f\u0446\u0438\u044f<\/p><\/td>

Seal quality, housing fit, outdoor use<\/p><\/td>

Water enters in rain<\/p><\/td><\/tr>

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Light response level and stability<\/p><\/td>

False switching<\/p><\/td><\/tr>

Strength<\/p><\/td>

Housing, pins, impact resistance<\/p><\/td>

Breakage in transport or field use<\/p><\/td><\/tr>

Documents<\/p><\/td>

Datasheet, test report, warranty terms<\/p><\/td>

Missing proof<\/p><\/td><\/tr>

Delivery Plan<\/p><\/td>

Packing, shipping method, lead time<\/p><\/td>

Delay or damage<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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How Can Buyers Judge Whether A Supplier Is Strong Enough For Bulk Orders?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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A supplier may do well on one sample and still struggle with bulk delivery. That is why buyers should ask about capacity, repeated order handling, and document control. You want to know if the factory can stay steady after the first order, not just during the sales stage.<\/p>

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This is where product range also matters. Long-Join says it offers NEMA series products, Zhaga series products, and photocell-related items for different buyer needs.<\/p>

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You should also ask who handles after-sales support. If something goes wrong, is there a clear team, clear reply path, and clear replacement policy? Long-term cooperation grows when problems are handled well, not when problems never happen.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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byer judge choose who Strong Enough For Bulk Orders<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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What Extra Checks Help Verify A Supplier\u2019s Real Strength?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Buyers should look beyond the quote sheet. Check certifications, export experience, and proof of product development. Long-Join\u2019s public pages state that its products have obtained certifications such as UL, CE, RoHS, and in some places C-UL or CB depending on the product line. Buyers should still ask for the exact documents that match the exact product being quoted.<\/p>

\u00a0<\/p>

Patent and R&D claims should also be checked carefully. Long-Join states on one company page that its product development is based on its own intellectual property and mentions four national invention patents and nearly 30 utility model patents. On other pages, it describes over 30 patents or 37 international patents, so buyers should ask the company to clarify which count applies to which scope.<\/p>

\u00a0<\/p>

That does not mean the supplier is weak. It means serious buyers should verify details instead of repeating marketing lines without review.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Which Supplier Proof Documents Matter Most?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Proof Type<\/b><\/strong><\/p><\/td>

\u041f\u043e\u0447\u0435\u043c\u0443 \u044d\u0442\u043e \u0432\u0430\u0436\u043d\u043e<\/b><\/strong><\/p><\/td>

What Buyers Should Ask For<\/b><\/strong><\/p><\/td><\/tr>

\u0421\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f<\/p><\/td>

Shows market compliance<\/p><\/td>

UL, CE, RoHS, C-UL, or product-specific files<\/p><\/td><\/tr>

Patent Or R&D Proof<\/p><\/td>

Shows technical depth<\/p><\/td>

Patent list or R&D summary<\/p><\/td><\/tr>

Export Cases<\/p><\/td>

Shows market experience<\/p><\/td>

Case references or customer regions<\/p><\/td><\/tr>

Quality Documents<\/p><\/td>

Shows process control<\/p><\/td>

Inspection flow, warranty terms<\/p><\/td><\/tr>

Service Support<\/p><\/td>

Shows long-term reliability<\/p><\/td>

After-sales process and contact point<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Why Do Many Buyers See Long-Join As A Strong Long-Term Option?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Long-Join presents several strengths that matter to buyers. Its website says the brand has been active since 1996 and also describes itself as having over 20 years of specialization in photocontrol and connector products.<\/p>

\u00a0<\/p>

The company also presents itself as a supplier for global lighting buyers and references partnerships with brands such as \u0424\u0438\u043b\u0438\u043f\u0441<\/u><\/a>, GE \u041e\u0441\u0432\u0435\u0449\u0435\u043d\u0438\u0435<\/u><\/a>, \u0438 \u041a\u0440\u0438<\/u><\/a>\u00a0on some pages. Because those claims appear in marketing content, buyers should still ask for project or customer verification where possible.<\/p>

\u00a0<\/p>

What makes this useful for buyers is not just the brand story. It is the mix of standard products, export-facing positioning, and visible category depth. If a buyer wants photocell for street light\u00a0projects, sockets, and smart upgrade paths from one source, that kind of supplier profile can reduce friction.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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What Is The Best Way To Build A Long-Term Relationship After The First Order?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Start small, verify carefully, then grow. That is the safest path. Use the first order to test product quality, paperwork, delivery speed, and communication. If the supplier performs well, move into repeat orders with clearer forecasts and stronger planning.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\u0417\u0430\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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A strong supplier relationship starts with clear buying plans and careful checks. It grows through sample testing, document review, and honest performance over time. For buyers in outdoor lighting, the best supplier is not just the one with the lowest price. It is the one that can keep quality, support, and delivery steady as your project grows.<\/b><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\u0412\u043d\u0435\u0448\u043d\u0438\u0435 \u0441\u0441\u044b\u043b\u043a\u0438:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\u25cf https:\/\/en.wikipedia.org\/wiki\/NEMA_connector.
\u25cfhttps:\/\/www.zgsm-china.com\/blog\/nema-vs-zhaga.html
\u25cfhttps:\/\/www.philips.com\/global
\u25cfhttps:\/\/en.wikipedia.org\/wiki\/GE_Lighting
\u25cfhttps:\/\/en.wikipedia.org\/wiki\/Cree<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

A strong supplier relationship starts with clear buying plans and careful checks. It grows through sample testing, document review, and honest performance over time. For buyers in outdoor lighting, the best supplier is not just the one with the lowest price. It is the one that can keep quality, support, and delivery steady as your project grows.<\/p>","protected":false},"author":1,"featured_media":17665,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[86,1,68],"tags":[],"class_list":["post-17662","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industries-post","category-long-join-blog","category-recent-post"],"acf":[],"_links":{"self":[{"href":"https:\/\/long-join.com\/ru\/wp-json\/wp\/v2\/posts\/17662","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/long-join.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/long-join.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/long-join.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/long-join.com\/ru\/wp-json\/wp\/v2\/comments?post=17662"}],"version-history":[{"count":4,"href":"https:\/\/long-join.com\/ru\/wp-json\/wp\/v2\/posts\/17662\/revisions"}],"predecessor-version":[{"id":17670,"href":"https:\/\/long-join.com\/ru\/wp-json\/wp\/v2\/posts\/17662\/revisions\/17670"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/long-join.com\/ru\/wp-json\/wp\/v2\/media\/17665"}],"wp:attachment":[{"href":"https:\/\/long-join.com\/ru\/wp-json\/wp\/v2\/media?parent=17662"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/long-join.com\/ru\/wp-json\/wp\/v2\/categories?post=17662"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/long-join.com\/ru\/wp-json\/wp\/v2\/tags?post=17662"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}