The police of Thailand and the country’s cybercrime unit arrested Pei Min Si on April 9, identified as the alleged leader of an extensive illegal online gambling network based in Myanmar. The operation took place at dawn in a hideout located in the coastal city of Pattaya, in response to a court order managed through the Chinese Embassy in Bangkok. The arrest ends nearly a year of international search and marks a new chapter in Beijing’s pressure on criminal networks operating from Southeast Asia.
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Who is Pei Min Si and how his network operated
According to the Chiang Rai Times newspaper, Pei Min Si is considered a central figure in the illegal online gambling underworld in Myanmar. The network he allegedly led operated through more than 239 digital channels and had more than 330,000 active members distributed across 31 provinces in China, in a context where online gambling is prohibited.
The scale of the operation is not minor: it is a structure that covered almost half of Chinese territory, with sophisticated digital logistics that allowed it to attract users massively and steadily for nearly a decade. The platforms operated covertly.
According to Thai authorities, the network has accumulated revenues of 13.18 billion Thai baht (approximately $409.8 million) since 2016, with estimated net profits of 2.4 billion baht.
A Caribbean passport to return to Thailand
Pei had fled Thailand in May 2024 using a Chinese passport and took refuge in Laos. However, in August 2025 he managed to re-enter the kingdom with a different document: a “golden passport” issued by Saint Kitts and Nevis, a Caribbean nation with a citizenship-by-investment program that has been criticized for allowing the purchase of documents without the applicant needing to appear in person.
The program costs are high: a minimum donation of $250,000, the purchase of a private property for at least $600,000, or a minimum investment of $325,000 in an approved development project. For someone with the volume of income attributed to Pei, none of these options would represent a significant obstacle.
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China’s response: zero tolerance and executions
China has shown a hardline stance against these organizations, especially when their operations are directed at Chinese citizens. In February 2025, the Chinese government executed eleven members of the Ming family, one of the so-called “Four Families” of Myanmar, convicted of telecommunications fraud, drug trafficking, and murder. The group was part of a broader structure alongside the Bai, Liu, and Wei organizations.
In a documentary about these networks, a researcher noted that the executions aim to send a clear message to the rest of the regional organized crime: regardless of position or location of operation, those who commit crimes against Chinese citizens will face consequences.
Illegal online gambling, a business that defies borders
The case of Pei Min Si is not an isolated incident. Southeast Asia has consolidated in recent years as a platform for operations for networks that exploit the demand for online gambling in countries where the activity is prohibited or heavily restricted. The combination of areas with legal gaps, cheap digital infrastructure, and institutional corruption creates favorable conditions for these structures to thrive with relative impunity.
For Chinese authorities, the problem has an additional dimension: it is not only about illegal activities but also about capital flows leaving the country and citizens who are victims of scams, forced labor, or gambling addiction in environments without any protective regulation. This explains the intensity with which Beijing pursues these networks beyond its borders.
A case that exposes the cracks in regional regulation
The arrest of Pei Min Si in Thailand highlights the complexity of combating illegal online gambling in a region where borders are porous, institutional corruption is a recognized factor, and illicit money flows cross multiple jurisdictions. The use of a citizenship-by-investment passport to evade justice adds an additional dimension to the debate about “golden passport” programs and their potential use by organized crime. What happens with Pei’s extradition and judicial process will be closely followed by both regional governments and Chinese authorities, who have made it clear they have no intention of closing this chapter.
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