http://tech.ifeng.com/internet/detail_2011_05/26/6652698_0.shtml
ZSTN basically distribute GPS System/service for East Coast Diversified Corporation(ECDC), they had business relationship for a while, at one time last year, they even talked about the merge according to the ECDC.
ZSTN has launched a commercial line of vehicle tracking devices utilizing ECDC's GPS tracking technologies and support services for transport-related enterprises to track, monitor and optimize their businesses.
For the first six months of 2011, ECDC's total sale was around 370,000.
ZSTN claimed the first nine months total GPS/Service sale was 15 million.
Assume, ECDC's whole year total sale was 1 million, ZSTN compromised 40% of ECDC's sale. ZSTN was able to resale for 3 times they paid to ECDC, so the whole year GPS/SERVICE sale should be no more then 1.2 million, There is a huge gap between estimated less then 1.2 million GPS/Service sale VS 20 million ZSTN claimed.