It seems that the only official newspaper suitable for children is Weiqi Weekly in China, and my son's chess school has ordered one for him. But the previous one was not very good, but it seems to have been revised later. My son likes it very much, but the fly in the ointment is that the content is a little thin.
I work in the post office. Just now, someone upstairs answered Weiqi Junior, which is actually not a regular publication and has no serial number.