Microsoft announced Wednesday it is selling roughly 1,500 patents to Chinese smart phone manufacturer Xiaomi and that the pair is starting a long-term partnership. The deal surprised many technology industry insiders.

Neither company discussed financial details of the deal, but it appears that Microsoft might be bolstering a relationship with the Asian upstart after its failed ventures into smart phone manufacturing.

Not only is Microsoft selling patents to Xiaomi, as opposed to leasing them as is usual, the two companies agreed to a patent cross-licensing agreement. Xiaomi also committed to install Microsoft software, including Word, Outlook and video chat service Skype, on its smart phones and tablets.

Xiaomi currently sells smart phones in China, Taiwan, Hong Kong, Singapore, Malaysia, Philippines, India, Indonesia and Brazil, but has been eyeing international growth, especially in the United States, since its market share has dipped in its home country. The company launched its first products in the U.S. in May, which included a tablet and a television set-top box similar to Apple TV.

To move into the American smart phone market means Xiaomi needs to ensure it doesn’t violate any of its competitor’s patents. The patents bought from Microsoft revolved around technology that included cloud computing and voice communications.

“We are excited to be working closely with Microsoft on a broad technology collaboration partnership,” Xiang Wang, a senior vice president at Xiaomi, said in a statement. “As demonstrated by this agreement with Microsoft, Xiaomi is looking to build sustainable, long-term partnerships with global technology leaders.”

Also last month, Microsoft announced that it was cutting employees involved with its smart phone venture. By partnering with Xiaomi, Microsoft could stay in the smart phone market without as much risk.

“People want their favorite apps and experiences to work seamlessly on the device of their choice, and that’s exactly what this partnership offers,” Peggy Johnson, an executive vice president at Microsoft, said in a statement.

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