Xu Tiantang is played by Yuan Weihao.

Xu Tiantang, a suave playboy, has an unrequited love with undercover Zheng Shumei.

Xu Tiantang has quick reactions, strong skills, and a pure heart. By launching a new gourmet express business, he became the right-hand man of Wei Dexin, the restaurant owner in Changxing.

Wei Dexin asked Xu Tiantang to go to Thailand to capture Tan Huanxi, but Xu Tiantang said that he was enough alone.

And in Thailand, Xu Tiantang used his own methods to bring back Tan Huanxi, but he did bring back a lot of goods.

Undercover agent Zheng Shumei came to a nightclub owned by Wei Dexin and Scarlett Scarlett. Zheng Shumei was almost molested by a gangster, but was rescued by Xu Tiantang who came over. The two slept in the same bed by mistake again.

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But the whole night was uneventful.

Plot synopsis: In 2010, Senior Inspector Zhuo Kai of the Criminal Intelligence Division of the Hong Kong Police Force went to Thailand to track down transnational drug trafficking lines with the undercover agents assigned there.

When Hong Kong drug dealer Jiu Zhiqiang was trading with Thai drug dealer Nichkhun, Pak Key, the leader of the Lucky Gang in Bangkok's Chinatown, suddenly broke in. With the help of his right-hand man Le Shaofeng, he got rid of Nichkhun's group and became Jiu Zhiqiang's gang.

New partners.

Zhuo Kai and the undercovers took the risk to obtain criminal information on Pak key's computer. When Zhuo Kai reported the good news to the Hong Kong police, they encountered a sudden explosion.

Joyfully recruited top thugs to guess Fing, and then deployed a dragnet to ambush Wei Dexin.

However, Dexin had served in the military in the United States, but the assassination attempt failed, and Huanxi had to flee to Thailand.

Zhuo Kai discovered that Shumei was just an untrained novice undercover agent, but she went to Thailand alone to help Rui Quan find the missing undercover agent.

Driven by fate, Shumei meets Huanxi who has fled to Thailand. Zhuo Kai decides to train Shumei in order to find Rui Quan's missing undercover agent.