Forgot to post this earlier. This is called zhīma qiú in Mandarin: 芝麻球. And Jin Dui in Cantonese. It’s made out of glutinous rice flour, azuke bean paste, and sesame seeds. The mochi dough is made, filled with bean paste, rolled into a ball, covered in sesame seeds, fried, and then fried again.

recipe: https://thewoksoflife.com/sesame-balls/