Mr. Yin, from September 1994 to September 2010 served as Accountant of Beijing No. 2 Water Pipe Factory, Audit Manager and Audit Partner of Yuehua Certified Public Accountants Firm, and Senior Partner of Zhongrui Yuehua Certified Public Accountants Co., Ltd. From October 2010 to May 2011, Mr Yin served as Chief Financial Officer of JCHX Mining Management Co., Ltd. From May 2011 to April 2017, Mr Yin served as Chief Financial Officer and Secretary of the Board of Directors of JCHX Mining Management Co., LTD (Shanghai Stock Exchange Code: 603979). From April 2017 Mr Yin has been Vice President, Chief Financial Officer and Secretary of the Board of JCHX Group Co., Ltd. Mr. Yin has been the chairman of the Board of Supervisors of JCHX Mining Management Co., Ltd (Shanghai Stock Exchange Code: 603979) since May 2017. Mr Yin has been an Independent Director of- Beijing Century Real Technology Co.,Ltd since September 2018; Beijing Yiqiao Shenzhou Technology Co., LTD since March 2020; and previously, from October 2009 to March 2015, Dalian East New Energy Development Co., Ltd.
