By the way, I don't know who sealed the "China Core Journals". It is probably self-styled, or the old ancient books have little influence. Since 1996, core journals generally refer to Peking University Chinese edition or Nanjing edition; At a lower level, we call it "the core journal of science and technology", and "the core journal of China" is nothing. Real core journals should be dynamically evaluated and updated. The content of "China Standardization" is no longer a simple sci-tech periodical, but all news trends, work summaries and things with propaganda colors are published.