I'm sharing this info from a contact whom I've met through my work. Her name is Su He and she can be reached via email at firstname.lastname@example.org. Her message is below:
"I have a part-time English teaching position looking for candidates. I would need probably 10-15 teachers, English native speakers. It is an online classroom setting teaching Chinese kids (K-12) English, with established software and materials. The class hours are 0.5 hour long/per class, can be arranged from 6-10AM, 3 times a week. $20-28/per hours plus bonus depends on teaching skills and feedback from students.
The company is called 31abc, here is the link where they have a general introduction of their platform (http://teacher.31abc.com/?z=). I am in charge of their U.S. recruitment and directly work with Director of Teacher Management."
If you taught ESL in Peace Corps, this could be a nice side gig.