Baidu (BIDU -0.56%) intends to buy Chinese mobile app store 91 Wireless for a total of $1.9 billion, Baidu announced today.

Baidu, the leading Chinese language Internet search provider, signed a memorandum of understanding with Chinese online gaming company NetDragon to purchase all 57.41% of of the shares of 91 Wireless that NetDragon owns.

The agreement calls for Baidu and NetDragon to come to definite terms on the transaction by Aug. 14. Until that date, NetDragon cannot approach or discuss with any other party regarding the sale of 91 Wireless.

Baidu said it intends to purchase the remaining shares of 91 Wireless from the other shareholders under the same terms as it reaches with NetDragon, but only if those shareholders are willing to sell their shares by Aug. 14.

91 Wireless is, according to a 2011-2012 report from iResearch, the largest third-party app distributor in China.