With deep regret, I've had to implement a filter that block all IP traffic originating from Chinese internet service providers. This affects all of the websites and blogs under my control. The reason for this was that I was getting an inordinate amount of web traffic from those IP ranges. These were likely not legitimate traffic but instead spam and/or hacking attempts.
With 25-50 gigabytes of traffic a day, my website provider was going to charge me over $1000 a month in bandwidth over-usage costs, even after I had upgraded to one of their high-volume contracts. I just couldn't afford this.
Since implementing the block, web traffic has plummeted back to normal levels.