A senior technician from one of four consortiums vying to build the new government headquarters at Tamar admitted yesterday he had submitted almost 73,000 electronic comment cards giving his group's proposal an 'excellent' rating. Cheng Wai-pui, 41, who worked for the China State-Leighton-Yau Lee joint venture, pleaded guilty in Eastern Court to six charges of obtaining access to a computer with dishonest intent. Sentencing was adjourned to October 9, pending a probation report. Prosecutor Hayson Tse Ka-sze told the court that during a public showing of the four designs for the HK$5.2 billion government headquarters project, the public was invited to make their comments at the exhibition or via the internet. In all, 78,328 comments were received via the internet during the two-month showing from March 28 - 72,948 of which rated Leighton's design 'excellent'. The latter were found to have been sent from two of the company's IP addresses on 21 separate occasions. The government wrote to Leighton about the incidents on May 9, the court heard, and a few days later Cheng called the company's regional systems manager. He apologised, saying he had designed a computer program and had tested it by sending out the comment cards, without realising the consequences. Writing programs was not part of Cheng's job, the court heard. The systems manager made a report to police next day. A further eight charges of obtaining access to a computer with dishonest intent were left on file, with the prosecution reserving the right to proceed with them. The consortium's 'sailing boat' design, featuring two horizontal blocks with two lower blocks in front, was seen as one of the leading contenders for the project. In July, the government announced the tender had been awarded to a Gammon-Hip Hing joint venture, whose design features a towering arch known as 'the door'.