What does JETC on China Merchants Bank's Hong Kong card mean?

JETC Yintong, the full name of UnionPay Bao Tong Co., Ltd., is the largest ATM network system in Hong Kong and Macao. At present, there are more than 3,000 ATMs supporting Yintong, which are interoperable with each other. Bank customers can withdraw money from other banks' Yintong ATMs, and all of them can avoid the charges in the same city, thus avoiding the inconvenience of withdrawing money only from their own ATMs.