it's useful and good. And it makes me sad that the good chinese people working on this nice and useful chinese website have to draw lines of different widths and colours that make statements I am sure they themselves would never make about conquest and pain and suffering for the people behind the not-a-line, for example Bhutan on this map does not have a northern border with China, or at least dotted , not a border. Why oh why what is the point can't we just get along in the maybe one day less polluted air ? ? ?