Here's a brief summary in case you haven't been following the simmering beef between Washington and Huawei, which has played out over the past 18 months in a bevy of attacks on the US side.

In December 2018, Canadian police arrested Huawei's CFO Meng Wanzhou, who is also the daughter of the company's widely-beloved father. Since then, the Commerce Department has added Huawei to its 'entities list' - essentially a 'black list' that requires companies to get special permission from the Department if it wants to sell American made goods to Huawei (it applies to products with even a relatively modest percentage of American-made components).