[AGREEMENT REGARDING THE JOINT FILING OF SCHEDULE 13D (ii) Each of them is responsible for the timely filing of such Schedule 13D and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other persons making the] [EQUITY COMMITMENT LETTER 21 February 2013 H.D.S. Investments LLC Room #405, Bldg C Wangzhuang Science & Technology Innovation Park, No. 4 Longshan Road, New District, Wuxi Jiangsu Province, People’s Republic of China Ladies and Gentlemen: This letter agreement sets forth the commitment of H.D.S. Investments LLC , a limited liability company incorporated under the laws of State of Washington Sponsor] [VOTING AGREEMENT Agreement This VOTING AGREEMENT (this “ WSP OCTG GROUP Ltd. (WSP 石油钢管集团有限公司 ) Parent , a company incorporated under the laws of the Cayman Islands (“ JM OCTG GROUP Ltd. (JM 石油钢管集团有限公司 ) , Merger Sub Shareholder a company incorporated under the laws of the Cayman Islands and a wholly-owned subsidiary of Parent (“ Company Merger Agreement Merger] [ROLLOVER AGREEMENT Agreement This ROLLOVER AGREEMENT (this “ WSP OCTG GROUP Ltd. (WSP 石油 钢 管集 团 有限公司 ) Parent , an exempted company incorporated in the Cayman Islands (“ 石油钢管集团有限公司 Merger Sub Company Rollover Shareholder Rollover Shareholders ), an exempted company incorporated in the Cayman Islands and a wholly-owned subsidiary of Parent (“ Merger Agreement WHEREAS, Parent and Merger] [AMENDMENT NO. 2 AND ASSIGNMENT AND ASSUMPTION AGREEMENT Agreement This AMENDMENT NO. 2 AND ASSIGNMENT AND ASSUMPTION AGREEMENT, dated as of 19 March 2014 (this “ 1) WSP OCTG GROUP Ltd. (WSP 石油钢管集团有限公司 WSP OCTG ), an exempted company with limited liability incorporated under the laws of the Cayman Islands (“ 2) JM OCTG GROUP Ltd. (JM 石油钢管集团有限公司 JM OCTG] [ASSIGNMENT AND ASSUMPTION AGREEMENT Agreement This ASSIGNMENT AND ASSUMPTION AGREEMENT, dated as of 19 March 2014 (this “ 1) WSP OCTG GROUP Ltd. (WSP 石油钢管集团有限公司 WSP OCTG ), an exempted company with limited liability incorporated under the laws of the Cayman Islands (“ 2) JM OCTG GROUP Ltd. (JM 石油钢管集团有限公司 JM OCTG ), an exempted company with limited liability incorporated] []