You don't put tariffs on products leaving the country. You need to read on how tariffs work. Canada's high tariffs on US dairy ( which is what I assume you're referring to) is an OVER QUOTA tariff,  it kicks in after a certain amount. The US has never exported enough dairy to us to pay that tariff, and the reason for it is to protect Canadian farmers from shitty cheap American dairy products (who have abysmal feed and animal welfare regulations, as well as use growth hormones to produce more milk) being dumped in our markets.

And the reason you know about Chinese fentanyl labs and police stations is because we ARE talking about them.