QIHU [Qihoo 360 Technology Co] SC 13G: Joint Filing Agreement [Remainder of this page has
[Joint Filing Agreement [Remainder of this page has been left intentionally blank.] CDH Net Technology Limited CDH China Growth Capital Fund II, L.P. CDH China Growth Capital Holdings Company Limited, its general partner] [CUSIP No.: 74734M109 (1) Name of Reporting Persons]