I don't know if this will work, but, I'm going to try to add a short video. This is of yesterday, at the civil affairs office to officially complete the adoption. (Sorry I didn't post again yesterday! We had a busy day and I was too tired to post again).
So, the interpretation of the video (if it shows up) is:
Tanner asking Jian "Do you want to join our family?" Jian's response (in ASL), "I want, want, want"
Hopefully this works!
OK - it doesn't look like it will let me, the video is too big :( So, here's a picture from when Tanner was asking Jian.