The first time I went from HK to Shenzhen about 8 years ago was quite an eye opener for me. Totally modern, VW Passat taxi's, amazing hotel quality and service for the price. Great range of things to do and places to eat. Traffic was a bit patchy and it did feel a little like Westworld at some points. The rest needs an 18 certificate so I avoided it and stayed the right side of the line.
