COMPOSITE OFFER AND RESPONSE DOCUMENT RELATING TO MANDATORY UNCONDITIONAL CASH OFFER BY HUATAI FINANCIAL HOLDINGS (HONG KONG) LIMITED FOR AND ON BEHALF OF SHANDONG HI-SPEED HOLDINGS GROUP LIMITED TO ACQUIRE ALL THE ISSUED SHARES OF SHANDONG HI-SPEED NEW ENERGY GROUP LIMITED AND TO CANCEL ALL THE OUTSTANDING SHARE OPTIONS OF SHANDONG HI-SPEED NEW ENERGY GROUP LIMITED (OTHER THAN THOSE ALREADY OWNED OR AGREED TO BE ACQUIRED BY THE OFFEROR AND PARTIES ACTING IN CONCERT WITH IT)