THE top official in charge of Hong Kong affairs, Lu Ping, is to take a week-long visit to the United States next month in an effort to promote the Basic Law among Hong Kong's overseas investors. He is to join five local co-convenors of the Preliminary Working Committee (PWC) and two other PWC members, Paul Cheng Ming-fun and David Chu Yui-lun. Mr Cheng, the PWC member who arranged the tour, said the move was a positive development for Hong kong as an international financial centre. 'It is the first time that the most senior Chinese official in charge of Hong Kong will be coming with us and it will be a very good thing for Hong Kong's commercial activities,' Mr Cheng said. The delegation will visit Seattle, New York, Los Angeles, Chicago and Washington, and will speak on the theme of Hong Kong Beyond 1997: Life and Business Under the Basic Law. Meanwhile, a Beijing-appointed working panel on the changeover has backed China's call for sensitive files of senior government officials to be handed to Beijing. Leung Chun-ying, local co-convenor of the PWC's political sub-group, said the body had reached a 'clear' stance on the handling of secret information. PWC member Shao Tianren, who is also a legal adviser with the Foreign Ministry, said Beijing had full legal rights to the files because it was China who would resume sovereignty over Hong Kong. The row began last month when Mr Lu accused the Government of seriously infringing the Joint Declaration by refusing to transfer the secret files. The Government responded by saying it was obliged by law not to reveal the nationality of senior officials.