Tian Jiajia's scientific name is Apriona germari. It's a beetle crawling all over the ground after summer and autumn rain. It is black all over and has a pair of "clips" (the only self-defense weapon) in front of its head. When it rains, it will fly all over the sky and can be seen everywhere in wheat stubble fields.
The above information is for reference only. If more professional insect taxonomy is needed, it is suggested to consult an entomologist or refer to a professional insect taxonomy textbook.