China is ramping up its efforts to combat online gambling, including the creation of an online blacklist and increased scrutiny of financial transactions.

Last week, China’s Ministry of Public Security held a meeting on combatting ‘cross-border gambling’ at which Minister Zhao Kezhi called on officials to investigate “a number of major cases” of internationally-based online gambling operators serving Chinese customers in order to “completely destroy a group of criminal organizations.”

Zhao added that it was “necessary to establish a ‘blacklist’ system for participating in gambling and employees and overseas tourist destinations.” The ministry also seeks to “strengthen the ‘fund chain’ and ‘technical chain’ governance measures and resolutely cut off the channels for the circulation of gambling funds.”

Zhao’s call was followed up Monday by China UnionPay announcing that some of its partners were failing to “take effective measures to curb illegal elements from engaging in illegal trading activities.” While UnionPay’s announcement also mentioned sketchy loan arrangers and other “illegal public merchants,” it reminded its partners that they are barred from doing business with online gambling and online lottery platforms.