BEIJING (AP) — Microsoft Corp. will hire more than 1,000 additional employees in China this year and boost research and development spending by 15 percent as it tries to catch up with Apple and Google in the fast-growing mobile Internet market, executives said Thursday.

The announcement adds to intensifying competition in wireless Internet in China, where nearly 400 million people surf the Web using mobile phones and other devices. Microsoft is promoting its Windows 8 mobile operating system but came late to the market and trails Apple Inc. and Google Inc., whose Android system is widely used in China.