Yahoo has acquired the Beijing based social-network data analysis startup, Ztelic, in order to increase its research and development operations effort.

The acquisition is expected to help the company’s advertising products in delivering more relevant, socially targeted ads.

As part of the deal, about eight employees of the Chinese company will join Yahoo’s research and development team in Beijing.

The transaction is said to be the 19th acquisition for Yahoo following CEO Marissa Mayer’s appointment.

Ztelic founder Hao Zheng, who is also a former Yahoo employee in China is expected to play an important leadership role in the company’s Beijing Global R&D Center by sharing his time between the location and Yahoo’s Sunnyvale headquarters in the US.

Earlier this year, Yahoo had acquired email and address book management app Xobni, mobile moviemaking app Qwiki, cross-platform gaming company PlayerScale and blogging and social networking site Tumblr.