Today, 40 years ago, on March 4, 1985 (January 13, 1985), Deng Xiaoping met with the Chinese delegation visited by the Japanese Trade and Industry Conference. On March 4, 1985, Deng Xiaoping met with the Chinese delegation visited by the Japanese Trade and Industry Conference, and analyzed the current international situation from a political and economic perspective. He said: Now the world's real big problem, with a global strategic problem, one is a peace issue, one is an economic issue or a development issue. Peace issue is a thing issue, development issue is a South-North issue. In summary, it is the four words of the South-North issue. The South-North issue is the core issue.