25 Years ago NAIROBI (September 28): CHINA has expressed interest in joining the 129-nation International Monetary Fund and the World Bank. The Nairobi meeting of the IMF was thrown into a tizzy last night by the out-of-the-blue message from the Chinese Foreign Ministry, which was sent by way of an official communique to Washington. The Chinese bulletin was passed on to Mr Johannes Witteveen in Nairobi. There was no immediate comment from here other than to say that China's approach would be considered at a special meeting next month. First reports, in a confused situation, indicate that China would want to see Taiwan out of the IMF to make way for its representative. The implications of this astonishing news are far reaching. Among other things the convertibility of the RMB might have to be reassessed by China and the world monetary leaders. The Chinese communique was the most exciting news to hit the Nairobi gathering and everybody here is agog to to find out just what it involves.