Although China spans more than 45° of longitude, they switched to one time zone for the whole country. China Standard Time (CST) is 8 hours ahead of Coordinated Universal Time (UTC) with no daylight saving time.
one
About 4 or 5 time zones span China
There are 15 time zones between Colorado and China.
unknown
How many times does New Zealand fit into China
30
Just the one, GMT
7
There are 11 time zones in Russia.
All of Hong Kong is UTC+8. All of China is UTC+8.
This will depend on where you are located. China is an extremely large country and has many time zones. Take a look at the link to the left for additional information.
There is no time difference between Maine and Massachusetts.