Last year the planning exhibition announced that part of the program to clean up the air pollution will involve constructing 9 new underground metro lines, in addition to the 2 existing ones, and about 6 new light rail lines at ground level. This March, when I returned to Shanghai, they had already built 10 km of the first new line and were announcing that in October they will begin construction of a super-fast magnetic levitation railway to join the new Pudong international airport to the metro.