First, this is a distribution map of those company headquarters location.
Beijing : 22 companies (52.3%)
Shanghai : 11 companies (27.3%)
Hangzhou : 2 companies (4.5%)
Guangzhou : 2 companies (4.5%)
Shenzhen : 2 companies (4.5%)
Hongkong : 2 companies (4.5%)
Fuzhou : 1 company (2.3%)
Next is the establishment year of each companies.
These are summary of it.
1988 Kingsoft(*1)
1997 NetEase
1998 Sina, Tencent, Sohu
1999 Alibaba, SNDA
2001 Baidu(*2)
2004 Giant
2005 Renren, Tudou, 360
2006 Youku
*1 According to their homepage, establishment year was 1989.
*2 According to their homepage, establishment year was 2000.
Next graph is their listed market.
Nasdaq 52.3%
NYSE 22.7%
HKEx 18.4%
SSE 2.3%
SZSE 4.5%
Next graph is the listed year of each companies.
These are summary of it.
2000 Sina, Sohu, NetEase
2004 Tencent, SNDA
2005 Baidu
2007 Giant, Kingsoft, Alibaba
2010 Youku
2011 Tudou, 360, Renren
Last is a graph of their market cap and sales growth rate.
Tencent : 51.75 billion RMB (sales growth rate 45.0%)
Baidu : 40.07 billion RMB (sales growth rate 83.1%)
NetEase : 7.69 billion RMB (sales growth rate 131.9%)
Sina : 3.34 billion RMB (sales growth rate 19.9%)
Youku : 2.38 billion RMB (sales growth rate 131.9%)
* Alibaba, SNDA, TOM, CRIC and china.com were already delisting.
Source => 91.com
