Pay mutual fund participation as required. Where employees and retirees who participate in the basic medical insurance for urban workers in Yunnan Province and at the same time participate in the supplementary medical insurance for serious illness pay mutual assistance fees according to regulations, their grass-roots trade unions shall organize them to participate in the medical mutual assistance for employees in Yunnan Province. Medical mutual assistance refers to a kind of social medical insurance established by urban workers on the basis of participating in basic medical insurance to solve the medical expenses of insured patients exceeding the maximum payment limit of the basic medical insurance pooling fund.