When cracks appeared in China 's house he feared the worse . Xiao 's hometown , Jining , is one of Xiao 's massive `` coal cities '' One has been turned into a wetland park , a major spot for bird watching in the northern part of the city ; another is now a fish breeding pond powered by solar panels . He watched many of his neighbors ' homes sink into the ground . Officials : The Yankuang Group devouring 7.7 square miles of land here the past decade .
When cracks appeared in China 's house he feared the worse . Xiao 's hometown , Jining , is one of Xiao 's massive `` coal cities '' He watched many of his neighbors ' homes sink into the ground . Officials : The Yankuang Group devouring 7.7 square miles of land here the past decade .