Why, you need to check who the IP address that is being blocked to see why.
Many images get posted in topics and it may be the source that it objects to. Given that the posters country is China it may be objecting to a .cn domain location.
Aside from the very large screenshots tell us nothing, that your opening didn't either, being a dial-up user, I don't really like having to open large screenshots to gather information only to find there is no information in them, is a pain.