The document summarizes China's four biggest media companies - NetEase, Tencent, Sina, and Sohu. It notes that Tencent owns the popular messaging apps QQ and WeChat, with over 1 billion and 600 million active users respectively. It also states that all four companies launched Weibo microblogging platforms in 2009, with Sina Weibo becoming the most popular with over 100 million posts per day. The document provides timelines of when the companies were founded and launched major products.

1. China’s BIG Four media companies
NetEase was founded in Guan-
gzhou in 1997.
QQ, the Chinese MSN/skype, an instant
messaging software service developed by
TenCent. As of January 2015, it has 829
million active QQ accounts.
WeChat, is a mobile text and voice messaging communica-
tion service developed by TenCent in January 2011. On
August 2015, it has the Monthly Active Users metrics to be
600 million. It has been spreading around the whole world.
NetEase Music, the Chinese Spotify,
was launched in April 2013. In 2015,
it was awarded the Best Visual
Design and Popular Application.
In 2009, all four companies launched the service of
Weibo, like Chinese Twitter. Sina Weibo is the most
popular one among them. About 100 million messa-
ges are posted each day on Sina Weibo.
Sohu was founded in Beijing in February 1998.
TenCent was founded in Shenzhen in November
1998.
Sina was founded in Beijing in December 1998.
1997 1998 1999 2009 2011 2013
TenCent
Sohu
Big Four’s Products % in pies
Video
Weibo
Finance
Sina
Blog
Weibo
News
WeChat
QQ
Game
NetEase
Music
E-mail Game
Headquarters:
----- Beijing
----- Beijing
----- Shenzhen
----- Guangzhou
SOURCES: BAIDU DATA CENTER