We are four members of family. We are visiting Hong Kong mid June, 2010. From Hong Kong, we wish to go to Shenzhen by Train for a day visit only (without night stay). Please inform on the following queries:-

1. Do we need Visa? (We are informed here that as per new Rules, Visa is exempted for a group of 3 and more persons. Or there shall not be any Visa Fee.)

2. If Visa required, then what are the formalities (Fee etc.) at the Station? Can we pay in HK Dollars?

3. How long it takes to get the Visa? Should we visit on any particular day (say, weekdays or weekends) to avoid rush?

4. Where to shop in Shenzhen & how to reach there?