Reddit mentions of Interchange Level 1 Student's Book with Online Self-Study

I've taught adult students while living in China. If she wants to pay you separately for your work, I'd take it. When teaching adults, I found structure to be VERY important. Most of them "just want to talk" but don't really want you to just talk with them. They often have expectations that they are not fully aware of or able to articulate, but "free talk" for an hour or so at a time gets really old really fast after about 3-4 classes. And making up the structure on your own is a whole other job in and of itself. I leaned heavily on external materials to provide structure, and the best materials I found for the job were the "interchange" series. There are 4 or 5 levels. Book 1 is here: https://www.amazon.com/Interchange-Level-Students-Online-Self-Study/dp/131662031X/ref=sr_1_1?keywords=interchange&qid=1570551825&sr=8-1 . These are great because they're readily available both in China and in the US. Your adult student can easily buy them from taobao 淘宝. My local library has them, too. Try to see them in person, look at the levels, choose an appropriate one for your student, then have her buy the set (CD, workbook, student book, and mini-dictionary) for the level you recommend on her side.

Wechat is fine. It's really your only option if you want to communicate directly with Chinese students / their parents. It is THE Chinese chat app, even moreso as China locks out other videoconferencing. Download it, set up a free account, and you're good. I mean, it is a Chinese surveillance app, so don't get to ranting about Xi Jinping or expose yourself.

For reference, the going rate for such a thing in-person in China is a MINIMUM of 200RMB, about $30 / hr. It can go all the way up to about 600RMB depending on the material, confidence of the teacher, area the student is in, etc etc. But I'd say if you want to be on the safe side, $30-40 USD / hr should be no problem. That brings us to the issue of pay: how will she get the money to you? Don't expect it to be easy -- China has ensured that it will not be. She'll probably want to transfer the money on Wechat, as that is what everyone in China is accustomed to doing. That would work great if you had a Chinese bank account to withdraw the funds to. I'm assuming you don't. As far as I know, Wechat will allow you to connect your US bank card / credit card, but WILL NOT allow you to withdraw funds to it. That means you'd have a bunch of useless money sitting in a virtual wallet in wechat. Don't want that. The other option I know of is for the student to set up a Paypal account on the Chinese side (paypal.cn), and transfer to your Paypal account. You'll lose about 4% in the transaction. There might be other options, but China makes getting currency out of the country rather difficult. It's worth addressing this in advance, because it'll take some research and legwork.

Good luck!