Will be visiting HK soon. Haven't been to Zhuhai nor Shenzhen to shop before. Thought of spending a day, ferry from HK to Zhuhai and then ferry from Zhuhai to Shenzhen, then Shenzhen back to HK by train. Possible? My husband holds a Malaysian passport, having a visa to enter Zhuhai, does he need another one to go into Shenzhen if it's the same day? Please advise.