Quote Originally Posted by Tmai View Post
Good pics, Zhilin. I don't think spider mites are your problem, but a good bath in soap or neem wouldn't hurt. As Karen suggested, please check the roots. Underwatering does not appear to be the problem, but overwatering may be an issue. It looks like a healthy plant except for the new growth = if the new growth is mushy and roots are brown and mushy then overwatering could be the problem, and I think you should follow Karen's suggestions.
Yes looking at the pictures - spider mites are not responsible.Overwatering looks more like it.