The progress has been slow but without all these projects the air quality would be much worse now than it is.

The exhaust-gas monitoring devices will be placed at several key sections in urban areas, mainly along the second and third ring roads.

In a developing nation, in a city of 13 million people, it is very difficult to make rapid progress. But we hope to build on the progress we make. The situation should ultimately improve.

We think those infringements should be stopped, and wish that the lawsuit against Lifestyle could have deterring effect. Since Liu brought the paper to court, similar cases have happened less.

Police officers should shoot only when it is absolutely necessary. It is a last resort, as guns kill.

With all the measures we are preparing, I am very confident the air quality will be high during the Olympics. It will not be a problem at all.