The government called for calm last night in the face of a plan by angry wholesalers to stage a slow-drive protest against the smuggling of vegetables from the mainland. About 100 trucks are expected to take part in the protest this afternoon, driving slowly from Cheung Sha Wan Vegetable Wholesale Market to the government headquarters in Central to call public attention to the problem of vegetable smuggling. A spokesman for the Food and Health Bureau called on the protesters not to obstruct traffic. The spokesman said the bureau had been in constant contact with mainland authorities over vegetable smuggling. He said the bureau would be happy to receive and act on any information about vegetables imported with faked certificates should traders have evidence. Earlier in the day, the government led a media tour to examine the inspection of vegetables at the Man Kam To border control point. So Siu-wah, divisional commander of the Customs and Exercise Department, said the sources of vegetables on the 28,000 delivery trucks inspected last year were found to differ from that stated in their documents. He said the department inspected 30 to 40 of the approximately 270 vehicles importing vegetables to the city every day. And '99.9 per cent' of the 37,000 inspected samples of imported vegetables met the food safety standards, the spokesman said. Chiu Chung-wai, superintendent of import and export with the Centre for Food Safety, would not say which government departments should be responsible for confirming the details written on labels for authorised imported vegetables. 'The General Administration of Quality Supervision, Inspection and Quarantine at the mainland is responsible for inspecting the imported vegetables [to ensure they] are all from the authorised farms and verifying the details listed on the labels,' Mr Chiu said. In April 2007, a labelling system was introduced to ensure the imported vegetables came from authorised farms, but vegetable wholesalers say the labels can be obtained easily by unauthorised farms. Imported Vegetable Wholesale Merchants Association president Yuen Cheung said the slow-drive protest would proceed today. The association said the government had failed to tackle the root cause of vegetable smuggling. 'The problem is smugglers can easily buy real labels from authorised farms on the mainland, so the existing labelling system would not be able to trace back the disqualified vegetables,' Mr Yuen said. Meanwhile, Wang Jun , head of the Shenzhen Entry-Exit Inspection and Quarantine Bureau, denied any evidence had been found that mainland chickens had been hidden among vegetable shipments to Hong Kong. From October 1 to December 31 last year, the office had inspected 281 vegetable trucks and had found no sign of chickens, he said.