Responding, the ambassador said that 1.7 million Chinese had come to Thailand in 2011 and that figure rose to 2.8 million last year.
''One in three of those Chinese visitors to Thailand come to Phuket,'' he said. ''It's as though they come to visit their family.''
He said Thailand's Prime Minister and China's Prime Minister had talked a lot about tourism already in 2013.
He says - a remarkable statistic - that between January and April, 1.5 million Chinese have already come to Thailand.
''I predict the total for the year will be four million,'' he said, ''and one in three will come to Phuket.''
The ambassador then lists six points for improvement, switching sometimes from Chinese to Thai.
Point One, he says, is infrastructure. It needs to improve.
Point Two is Guides. ''We need properly trained people who understand both Thai and Chinese culture,'' he said. ''If we can do that, we will have a good relationship.''
He says he has been holding talks with the TAT to try to solve the problem: ''Hopefully this will be sorted as soon as possible.''
Point Three: Zero baht tours, he said, were a rip-off, pure and simple.
Point Four: He continued: ''Police and Immigration do not have justice in their hearts. They are not moral and professional.''
He switched from Chinese to say in Thai: ''Police are corrupt in Thailand. Some of them use their positions of power to rip off tourists.
''This is not true of every tourist but there are enough cases for this to be a serious problem. We have to sort this problem out immediately.''
[The ambassador is likely to have many other envoys agree loudly.]
''When it comes to fraud in Thailand, there is a lack of quality among investigators. Some cases will never be resolved. Chinese tourists are not satisfied.''
Point Five: Not enough is being done to fix problems.
There are food poisonings and accidents, he says.
''Tourists' documents and money are stolen.
Drownings happen too easily on Phuket and Samui. These problems need to be solved.
Point Six: Signs in Chinese are needed to warn tourists, along with service in the appropriate language.
''I believe tourists have certain basic rights,'' he said. ''And Thailand needs to support the large number of tourists that we send with a matching degree of investment in facilities.''
He said he had heard about a group of Chinese who had to wait four hours in their hotel lobby for a bus.
''By next high season, i am hoping the Thai government will have improved the bus operations and have a sensible plan in place for guides,'' he said.
Law enforcement was needed when agents cheated customers, he said.
Tourist Police needed to speak Chinese. The 1155 hotline service should be improved with a Chinese service.
''Prevention and protection from accidents and rip-offs in the key,'' he said.
At first, zero baht tours had been welcomed but now it had become obvious that they were not in anyone's best interests, he said: ''A strong set of laws is necessary to preserve tourism quality.''
Signage needed to be dramatically improved on Phuket: ''Our people drown on the beaches here because they cannot tell what a red flag is. More work needs to be done to educate tourists and save lives.''
He recommended a special committee be established to control issues relating to tourism.
''These issues should be raised at least once a month and dealt with quickly,'' he said. ''Our aim is to help the industry to improve and to make good revenue for Thailand.''