How is the 504 error always displayed when reading trademarks on the website of the State Trademark Office? Isn't there several effective maintenance on the website of the State Trademark Office?

I encountered the same problem, but I tried for a long time. Later, I learned that the system of the Trademark Office has service hours in the relevant terms of trademark application:

Article 23 The opening hours of the online service system for trademarks are from 08: 00 to 20: 00 on legal working days and holidays (except for the seven-day national holiday and the Spring Festival holiday). If it is necessary to make temporary adjustments due to special circumstances, it shall be announced on China Trademark Online in advance, subject to the time specified in the announcement.

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