The chairman of a new poultry wholesalers' association was critically ill in hospital last night after suffering multiple chop wounds in a second attack in less than three weeks. Tsui Ming-tuen, 46, was ambushed when he and his wife, also 46, arrived in his car at the Cheung Sha Wan temporary poultry wholesale market in Hing Wah Street at 3.30am. Officers said he was chopped on his head, back, chest and shoulders by two attackers when he got out of his car. The attackers fled in a taxi when Mr Tsui's driver shouted for help. Mr Tsui was taken to Princess Margaret Hospital where he was last night in critical condition. On February 7, Mr Tsui was chopped on his head, hands and back by two men in a car park in the basement of Hop Yick Plaza, Mau Tan Street, Yuen Long, where he parked his car. Mr Tsui was among more than 40 poultry wholesalers who quit another poultry federation and established their own association last year. They are demanding the return of monthly management fees they paid.