Shenzhen too pricey? Cost-conscious Hongkongers dig deeper into mainland China

Seventy-something Hong Kong retiree Leung Ching says a meal for four in Shenzhen, the megacity in mainland China roughly an hour’s train ride away, that cost just over 300 yuan (US$45) a few years ago now runs to 500 to 600 yuan. It would cost around HK$1,000 (US$127.50) in Hong Kong, but only 300 yuan in Guangzhou and just 200...