I'm afraid they don't care about the US stock market, their business continues, without costs to report or submit whatever....
I've been holding few years ago a chinese pharma company, that was doing very well, and once in a sudden, went dark and let the ticker die ....
I hope i'm wrong on this one. I didn't sell anything here, some of you know that i own at lot of KWBT, what eventually could have made me rich ...