I've always been surprised by how decent the internet is in Shenzhen most of the time, but I have still had a lot of blocking on some trips. I barely used my VP

I've always been surprised by how decent the internet is in Shenzhen most of the time, but I have still had a lot of blocking on some trips. I barely used my VPN on my last trip because nothing I used was blocked. This hasn't been the case when I've even been in neighbouring cities like Dongguan or Zhongshan.