Internet in China / Nanjing Jiangsu

I know the problem since I lived in China for 4 years.
A bit strage is that you say no foreign Website opens. Usually most of them do (a bit slower than abroad, but however), but only a smaller number is blocked and you will be routed to a Chinese web-page, or the page is simply not available.

To avoid this use a good VPN. This will cost a small amount each month, but it worked perfectly.

Hi,

As first you should ask China Telecom to replace your modem and make sure they will replace with new one. Most of the time the modem is second or third hand.
I'm living in Guangzhou and using China Unicom that sucks as much as China Telecom.
So, the other option is to get fiber connection.
In any case this is not gonna make your life better if you need to surf through international website.
One solution is VPN but also in this case you can be frustrated due to the fact you need to keep changing server to be connected.
After using two different VPN service, two months ago I installed two a different type of VPN that works all the time without changing the server. The ISP is fully licensed and there is not problem to be block by the authority (that's what they told me and so far seems true).
Bye now