Qq.com run by Tencent Holdings (HK: 0700) became China's most popular portal by weekly traffic in December, CR-Nielsen, ACNielsen's Chinese joint venture with ChinaRank, said Monday. Sina.com.cn (NASDAQ: SINA), 163.com (NASDAQ: NTSE) and Sohu.com (NASDAQ: SOHU) came second to fourth. The following is the top three terminals for specific web purposes. Search: Baidu.com (NASDAQ: BIDU)/Soso.com/Google.comWomen: ...