When The Sunday Times visited the restaurant last night (Saturday night), it was business as usual and it was half-full. ------- The supervisor, Mr He Min, 27, said the NEA had sent about four or five officers there in the afternoon and had taken food samples. -------- 'They told me some customers had complained about stomach trouble so they checked the premises and reminded me to be more careful about cleanliness,' he said. ------- 'We had about 300 customers between Friday and now, and only 12 have complained. Ma la steamboat can sometimes cause diarrhoea so that may have been the problem,' he added. ------ Ma la steamboat uses very spicy soup stock. Mr He said the officers later put up a B grade certificate at the restaurant entrance. Customers last night did not seem bothered by the incident. ------- Said software engineer Ma Liu Chuan, 24: 'My friends and I come every week because the food is good. People may get sick from steamboat as they don't cook the food properly.' ------- 好像主要还是因为我们自己煮没煮好啊