Do I need to write the postal code of the recipient when sending a letter from Canada to China?

Postal code is required. When sending a letter from Canada to China, all the information of the domestic recipient should be written in the center of the front of the envelope. In fact, there is no uniform regulation on the real writing method in the world. You just need to write it clearly so that people in Canada and China can understand it. To do this, you can write in Chinese and English. For example, in the center of the front of the envelope, write down the recipient's information line by line from top to bottom, as shown below:

Zhang, three, three.

/Unit 3, Building KLOC-0/4/Room KLOC-0/4/Room KLOC-0/05

East Street 100 East Street/No.KLOC-0/00

Suzhou City, Jiangsu Province, postal code 2 15000

China, China

If you have a specific address and are not sure how to write it, you can tell me. If you are worried about privacy, you can use Baidu to know private messages.

I hope it helps you:)