[Joint Filing Agreement [ Yinan Hu Yinan Hu Kingsford Resources Limited Yinan Hu Director High Rank Investments Limited Qiuping Lai Director Qiuping Lai Qiuping Lai] [CUSIP No. G2352K 108 Page 2 of 9 1 NAMES OF REPORTING PERSONS 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) o (a) þ (b) 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION People’s Republic of China 5]