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Under the fog, the police further investigated and found that Cheng Yan had a twin sister named Cheng Xiaoyan who looked very much alike. However, due to the different life experiences and living conditions after their parents divorced, the two sisters have little contact and indifferent feelings. Just then, news came from the Hangzhou police that Cheng Yan, who was wanted, was staying at the Wang Hu Hotel in Hangzhou and acting suspiciously.

Wenzhou Interpol quickly dispatched and rushed to Hangzhou. With the full cooperation of West Lake Branch of Hangzhou Public Security Bureau, Cheng Xiaoyan and her partner Liu Ming were finally caught red-handed, and the sensational "Fox" robbery came to an end.

Crimes in which Cheng Xiaoyan is involved:

There have been four drug robberies in the city. According to the victim, the perpetrators were all young women, who used sex to seduce the victim and put sleeping pills in the food, causing coma and washing away the money. At that time, there were rumors and people were in a panic. Although the police went all out, they never caught the fox's tail, and the detection work was once deadlocked.

In May 2000, an anesthetic robbery occurred in Shenzhen, which brought a turning point for the detection of the case. Due to the same means of committing crimes and similar characteristics of criminals, the police in Wenzhou and Shenzhen decided to jointly investigate. After some twists and turns, the police finally determined that one of the criminals was Cheng Yan, a young woman from Wenzhou.

As a result, Wenzhou Interpol acted quickly and captured Cheng Yan overnight. Li, the deputy mayor, confirmed that he was in Hong Kong at the time of the crime and there was no time to commit the crime. Finally, it was found that Cheng Yan had a twin sister.