First of all, the United States asked Canada to detain Huawei, not for technology, but to suppress Huawei, with the aim of maintaining America's technological leadership and market occupation. Because Huawei has become the world's largest supplier of communication equipment, 5G technology has begun to surpass American companies, which will further reduce the living space of American companies, which is not good for American voice in this industry.
At the same time, suppressing Huawei is also a part of dealing with China, which is conducting a trade war with China.
Another purpose is the security threat that the United States has been speculating about. The security threat of Huawei products to the United States is real, because Huawei does not cooperate with the United States to reserve a back door for monitoring on communication equipment, so it becomes a security threat!
Pay attention to too secure communication equipment, which is a security threat to the five-eye alliance in the United States.