You need an optimized VPN for China with the following Features; Must have servers in locations near China like Singapore, Hong Kong, Japan etc. Must be a premium and reliable service optimized for China Must provide Internet Kill Switch Must be a No-log VPN Service Must Provide High-end AES -256-bit Encryption Must offer all VPN Protocols like OpenVPN (TCP, UDP), L2TP-IPsec, and PPTP Moreover, Only those VPN services work in China which are dedicated Chinese VPN which continuously updates their servers and technology to keep up with the Great Firewall of China. It requires resources, money and time to keep this process going and and not all VPNs are able to do that. As a Chinese I know how we find it difficult to battle off the Great Firewall of China (GFW) which unblocks all the foreign websites. To select a right Chinese VPN to use in China is not an easy task. Because the Great Firewall of China strictly monitors the internet in China and periodically blocks random and low quality proxies and VPN services. The (GFW) is the most sophisticated and strict Firewall in the world and to combat it and bypass it is a job of no ordinary and low-quality VPN. Some Best VPNs Services in China as per my personal experience are; ExpressVPN
The best solution is to use a VPN to unblock Instagram in China. You should connect to a VPN server in a country or region where Instagram is accessible.
For users in Mainland China, Hong Kong VPN and USA VPN are the best choices. Here is an article on this topic which will probably give you more information on that:
try this VPN which works in China ;