Invitees include Pan Shiyi and Zhang Xin, chairman and CEO of property developer SOHO China and Niu Gensheng, founder of Mengniu Dairy.
Gates and Buffett have urged American billionaires to give away most of their fortunes to charity. The pair say they will not be making similar requests of the Chinese businessmen, but will simply urge greater philanthropy.
There are at least 875,000 U.S. dollar millionaires in China, according to Shanghai-based analyst Rupert Hoogewerf. The country's average income was $3,600 a year in 2009.