In the 1700s how did great britain find a way to balance its trade with china

The British used the profits from the sale of opium to purchase such Chinese luxury goods as porcelain, silk, and tea, which were in great demand in the West.

this is all i could find

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: