What is the longest river in china that enters the east china sea near shanghai?

There are two major rivers in China that empty into this general area, the Yellow (Huang He) and Yangtze. Shanghai is located right on the banks of the East China sea, and the Yangtze River is the river that flows through Shanghai into the East China Sea, so that is your river.

i am a little confused myself with what goes with the letters and what goes with the numbers but ill do my best to you

the cordillera states and grand canyon are along the southwest u.s. and northern mexican pacific.

the great plains and southwest desert are also the prairie and home to many earthquakes too .

the coastal plains have poor soil and many factories started in the south.

is this what u needed? if not i can see what i can do