That's 1:1,000 per year so a much higher percentage of overall deaths. On the order of ~7% of all deaths in china assuming 1/1000 * ~70 year life expectancy.
Death rate in China is 7.7 deaths/1,000. So 1/1,000 caused by pollution would be closer to 13% of all deaths.
Wow, China's population must be aging really quickly.
Interestingly they're aging at 1 year per year, which is only a tiny bit slower than the people who live high in mountains who age at 1 year + epsilon (where epsilon is gravitational time dilation) per sea-level-year
I was curious how much altitude would affect aging so I did a quick google search. "The atomic clock calculated that for every 12 inches of elevation, 90 billionths of a second are added to a lifetime (79 years)"