The subject wants to ask, "Can't grass-roots trade unions buy annual fitness course fees for ordinary members of fitness app for employees?" Of course. According to the information of China Travel Service. Com, grass-roots trade unions should provide health protection, cultural entertainment and other services for employees and safeguard their legitimate rights and interests. Buying annual fitness course fees for ordinary members of fitness app can be regarded as a way for grass-roots trade unions to provide cultural and entertainment services for employees, which is in line with the provisions of the trade union law. Therefore, grass-roots trade unions can buy annual fitness course fees for ordinary members of fitness app for employees.