Hi, my family and I will be travelling to Macau, Hong Kong and Shenzhen with 9days, we will be staying in Hong Kong around 6D4N and will be taking train to go to Shenzhen for 2D1N and head to Macau after that for 3D2N, do I need visa when we return to Hong Kong or Macau? Where is the best place to stay in Shenzhen? Thank you very much and have a nice day.