$Sentage Holdings Inc(SNTG)$ they are few thousand of scammers in China try to scam worldwide money from stock. before that they mainly in HK market, now move over to US market. Even u make police report also no use, as they all using none register numbers, they can use any country number as they like. Again in the group, 100 people in a group, may be only 10 are real investor,  others all scammer and they will give a lot of shows for u to see 

go YouTube to search the video, u cN see, this already happened few years