For China’s top Internet search firm Baidu (BIDU), mobile is where growth opportunities lie. Mobile is driving more and more of its top-line growth in recent quarters. In the third quarter, sales from mobile accounted for 36% of total revenue. That’s up from 30% in the second quarter and 20% in Q4 of 2013. Traffic from mobile topped traffic from PCs in the latest quarter, driven by the adoption of browser apps.