Early years, heroin trade, and first arrest Tse continued his association with the Big Circle Gang in Toronto at the time when the group was trying to become established in Canada the late 1980s. In his early years in Canada, Tse, then only a mid-level member, negotiated a business partnership with the Toronto branch of the Montreal-based
Rizzuto crime family to smuggle high-purity and low-cost
heroin into Canada from the
Golden Triangle for distribution through the
American Mafia's networks in the US and Italy. Such business partnerships were unusual as the Mafia at that time generally refused to routinely trade with Asian organised criminal groups, yet surveillance wiretaps by the
Royal Canadian Mounted Police revealed Tse to be the point man and the Mafia's earliest Chinese business partner in the
heroin trade. By 1997, Tse would become the main person overseeing drug transport from Southeast Asia to Canada. After his return to Canada, Tse shifted his interest to synthetic drug trade in the
Asia-Pacific, as the demand of heroin has reduced and his existing Mafia-based North American distribution network had collapsed. In Sam Gor's early years, Tse pioneered a "guaranteed delivery" system by which his organisation would replace any seized drugs free of charge.
Market domination and personal wealth By the late 2010s, Tse became the biggest drug dealer in the Asia-Pacific, controlling over 70 per cent of the Australian meth supply and was also the dominant drug distributor of Japanese, South Korean and Philippine drug markets. Overall, Sam Gor in its heyday had a 40 per cent to 70 per cent share of the US$90-billion-worth Asia-Pacific drug trade. The proliferation of meth also sharply reduced its price by up to 70 percent in certain countries. Although no exact figures exist, it is believed that Tse accumulated tremendous wealth through Sam Gor. In 2019, the UNODC estimated that Sam Gor generated between US$8-billion and US$17.7-billion in revenue from meth a year earlier and had "expanded at least fourfold in the past five years." An official from the UNODC said that Tse's achievement and wealth potentially rivaled those of well-known drug lords, including
Pablo Escobar or
Joaquín "El Chapo" Guzmán. Tse also operated an elaborate money laundry scheme using Australia-based
Crown casinos which prompted a national inquiry in 2019. During this time, Tse lived a lavish lifestyle in Hong Kong. He travelled only by private planes and hosted grand birthday parties in private resorts. He also hired eight
Thai kickboxing bodyguards for his protection. A frequent
gambler, Tse boasted having "Macao in [his] pocket" and once lost
EUR 60-million in one night while visiting a casino there. Despite his low profile, Tse was sued in 2017 by Singapore-based
Marina Bay Sands casino in a Hong Kong court as he was claimed to have owned
SG$1.9-million in gambling debts. ==Downfall==