The cr price of concave-convex world card is different, which is about five yuan cheaper and about 50- 100 more expensive. Bump cards are not stationery, but toys, which can be sold.

Convex and concave world is a comic book created by Kai Chuang Society. The solo version of this work is published by Jiangsu Phoenix Literature and Art Publishing House and Yangcheng Evening News Publishing House, and the electronic version is published by Netease Comics, Buka Comics, Weibo Comics and Quick Look Comics. On September 29th, 20 17, he won the bronze medal of the most popular network award of 14 China Animation Golden Dragon Award.