What's the best way to color code this map ?

So you can color the bodies of water in blue

Then color the extent of the Shang Dynasty in a color of your choice as long as it is not blue

Then color the extent of the Zhou Dynasty in another color that is not blue and not the color you used for the Shang Dynasty

For the border of Modern China it would be very helpful to use a black marker to trace it .

I hope that this helped you out a lil

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: