Can we get visa on arrival more than 5 days at Lowu China port?

Sorry, the special VOA for Shenzhen is only five days. If you plan to stay longer, you should apply for a L type in advance or just ask for the extension from local entry and exit mangement bureau immediately after you arrive in Shenzhen. However, the second choice is risky. If you can't be granted, then you need to exit on the fifth day.