Is the US trying to contain Huawei - or kill it? SCMP tech editor John Artman analyses the increasing US sanctions on Huawei's access to high-tech tools and silicon chips and what it means for the company's existence, while Vancouver-based senior reporter Ian Young reports on the two year anniversary of the continuing extradition trial of Huawei CFO Meng Wangzhou, courtroom revelations and the impact of China's 'hostage diplomacy', imprisoning Canadians Michael Kovrig and Michael Spavor…