The Hong Kong Tourist Association's second mainland representative office is to open in Shanghai this week to court more visitors from eastern China. Hong Kong's Commissioner for Tourism, Mike Rowse, association chairman Lo Yuk-sui and He Guangwei, chairman of the China National Tourism Administration, will officiate at Friday's opening. The new office 'will strengthen marketing initiatives on the mainland and assist in developing the tourist market in eastern China', the association said. Its other mainland office is in Beijing. The mainland has become Hong Kong's largest source of visitors, with total arrivals last year at 2.6 million - up year-on-year by 13 per cent. Shanghai and the surrounding provinces of Zhejiang and Jiangsu accounted for 15 per cent of the total, making it the second-largest source of tourists after Guangdong.