PCCW Global, the international operating division of HKT, Hong Kong's premier telecommunications service provider, and Zhuhai Da Hengqin Science and Technology Development Co., Ltd. (DHQ Tech) will together explore the technological and regulatory viability of promoting multi-currency 'Tap & Go' mobile payment in the Greater Bay Area of Zhuhai, Hong Kong and Macau, in order to boost e-commerce, business trade and tourism in the region.