This postcard has two pictorial postmarks from the Albertan Capital of Edmonton. The first postmark features Edmonton City Hall with the phrase Alberta's Capital City. The date stamp on this cancel doesn't work anymore.
The second postmark is the Chinatown Gates postmark, it was introduced for the Chinatown Gate Stamps that were released last year, Edmonton was one of the cities featured on the stamp. There are two Chinese guardian lions at the top of the postmark in very fine detail and the word door written in Chinese at the bottom. The postmark is dated August 29, 2014.
These two cancels are available at the Main Post Office in Edmonton:
EDMONTON MAIN PO
11808-104 AVE NW
EDMONTON AB T5K 0C0