The sacking comes after McCallum criticised the US' request for extraditing Meng, following which he issued an apology, and then commented on the case yet again
The United States, Britain and other countries have warned of potential Huawei security risks
Huawei has been the target of a broad US crackdown, including allegations it sold telecommunications equipment that could be used by China's Communist Party for spying
US Justice Department charged Huawei and its chief financial officer, Meng Wanzhou with conspiring to violate US sanctions on Iran
Canada arrested Meng on December 1 at the request of the United States
'There are strong political motivations and political manipulations behind the actions,' China's foreign ministry said in a statement
The charges are the latest to accuse Chinese govt or Chinese companies of stealing intellectual property from US firms through a combination of cyberattacks, traditional espionage and other means
The case is a further sign that wider strategic tensions between the world's two largest economies will persist even if they reach a deal to end a months-long trade war
CFO Meng Wanzhou, the daughter of Huawei's founder, was arrested in Vancouver on December 1
Among other charges, Washington accused Huawei CFO Meng Wanzhou of violating the US sanctions against Iran
US intelligence chiefs in the hearing said China was the most potent threat politically, militarily and economically to the United States
Meng, the CFO of China's Huawei Technologies Co Ltd, is the central figure in a high-stakes dispute between the United States and China
In December, European Commission Vice President Andrus Ansip echoed US warnings about the threat posed by Huawei and ZTE
The executive also said that Huawei would open a 'cyber security centre' in Brussels next month that will show that the company is 'part of the solution, not part of the problem'
US Secretary of State Mike Pompeo cautioned allies against using Huawei equipment this week during a trip central and eastern Europe
Huawei is in talks with governments across Europe on security standards for new technology, although it's been unable to engage the US in similar negotiations
Commenting on the spying concerns, the Huawei founder reiterated that the company will "never undertake" any spying activities
Zhengfei said the company is much more advanced for the world to simply eliminate it and even if the US pressurises more countries, the company can scale down a bit
A blanket ban on Huawei would have a 'significant implication' for the wireless industry
The pressure by the US to pick a side presents a particularly painful dilemma for developing countries, such as India