I noticed that right away, myself. This is quite pronounced, in fact.
The train from Shanghai to WuShi or HangTzhuo is not attractive. I was there in 1991; and, the domestic aircraft were all in extremely bad condition. The folks in the airport, with whom I was working, advised me to "take the train". About six months before I arrived a domestic craft had drilled a new new hole in the ground near the airport. It was not uncommon.