Technicians at the Guangdong branch of China Tower Corp., which operates almost all of China’s mobile phone towers, check telecom facilities in Zhuhai, Guangdong Province, in this file photo. Shares in China Tower, the world’s largest mobile telecom tower operator, closed at HK$1.26 (16 U.S. cents) yesterday, the same as its initial public offering price, as the company made its stock market debut in Hong Kong after raising US$6.9 billion from investors. SD-Agencies