QIHU [Qihoo 360 Technology Co] SC 13D: CUSIP No. 13D Page 20 of 21 Pages
[CUSIP No. 13D Page 20 of 21 Pages Joint Filing Agreement This Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument. [Remainder of this page has been left intentionally blank.] CUSIP No. 13D Page 21 of 21 Pages Xiangdong Qi Young Vision Group Limited East Line Holdings Limited] []