There are many places to visit in Shenzhen, so you can Don&;t miss it. Happy Valley, Window of the World, Shekou Ocean World and OCT are all good punch-in attractions. You can also experience yachting or sailing. You can go to Qixing Bay or to the end of the competition venue. There are more activities going out to sea there. You can go to Youboat applet to buy tickets, which will be more cost-effective. Suggestions.