Instruction https://www.atmosera.com/blog/using-openvpn-azure-low-cost-private-vpn/
Create a OpenVPN Access Server on Azure in mainland China https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Fzealous-tree-0861df80f.2.azurestaticapps.net%2Fopenvpn-template.json