I don't know how they discipline in China...good question that I'd love to know the answer to if someone cares to share!
Most SW's advise "time in's" for adopted children. It's harder on the parent, but as many of the children were not given as much attention as any child deserves, a time out doesn't work for many. (They do for Lydia though!! But she was given a lot of attention in Desheng which I've heard is atypical.) Anyway, in a time in you lovingly hold the child so they cannot continue with the offending action, but at the same time they know they are loved and cared for...for more information you may want to visit
http://www.attach-china.org/ which gives more informationabout attachment disorders with people who have childen from China.