I am dora from nigeria.i have been visiting china but now my kids want to spend summer in PRC.how

Dora, you can apply for tourist L type for them to travel to PRC. The first step is to prepare the required documents including the passport and copy of its data page, the filled-out application form, a passport-sized color photo taken recently, as well as accommodation booking record and round trip air tickets.
The next step is to make an appointment for the interview between 15:00 and 17:00 every Tuesday or Thursday and submit the application to the embassy.