It has been a lively week in the Sino-US trade war, and on one of its key battlefronts, the fighting over telecommunications powerhouse Huawei Technologies has taken an unexpected turn.

That is thanks to a "statistics obsessed" professor in Vietnam crunching data from thousands of Chinese CVs that make it seem increasingly certain that Huawei is a covert project of the People's Liberation Army (PLA).

Meanwhile, on another front, a high-level official statement has made it hard to view China's Belt and Road Initiative (BRI) project of port and overland infrastructure investment as one with purely commercial motives.