* Tower shares priced at bottom of offered range at HK$1.26 each. : HONG KONG (Reuters/IFR) - China Tower Corp Ltd (0788.HK) has raised $6.9 billion after pricing its initial public offering (IPO) at the bottom of an indicative range, four people close to the deal said on Wednesday, in the world’s biggest listing in two years. The world’s largest telecoms tower operator sold 43.1 billion new shares, or 25 percent of enlarged share capital, at HK$1.26 ($0.1605) each, valuing the firm at about $28 billion, the people told Reuters. The top of the range was HK$1.58.