Required paperwork for dependent L visa

Aliyah, there is no more dependent L type. Instead, you should help your children to apply for S type. According to what I know, it's almost impossible to change visa types within China. You may confirm this with the local entry and exit management bureau/department. Except for the basic documents (passport, filled application form and a recent passport photo), you should prepare these documents if you plan to apply S type: an invitation letter from you, a copy of your temporary resient permit for employment and a kinship certificate (your children's birth certificates, both original and copy versions).