According to China Daily, Japanese messaging apps LINE became No.1 in free apps ranking of Chinese App Store.
LINE started Chinese support from December 12, 2012 and they cooperated with QIHU360. They entered the Chinese market and got No.1 in 4 months.
Of course China has WeChat. They have users more than 200 million and probably are the world's largest messaging apps. It is very important to LINE that they beat them. By the way, LINE has about 130 million users now.