中华人民共和国工会法（2022年1月1日施行） 第十一条

用人单位有会员二十五人以上的，应当建立基层工会委员会；不足二十五人的，可以单独建立基层工会委员会，也可以由两个以上单位的会员联合建立基层工会委员会，也可以选举组织员一人，组织会员开展活动。

The Trade Union Law of the People's Republic of China (effective since January 1, 2022)
, Article 11 

The trade union of an employing unit with 25 or more members should establish a primary trade union committee. If members number less than 25, a primary trade union committee may be established independently, or a primary trade union committee may be jointly established by members of two or more units, or an organizer may be elected to organize members to carry out activities.