Chinese government officials have demanded a U.S. investigation into the death by suicide of a Chinese researcher at the University of Michigan.

A reclusive Chinese billionaire whose prescient gold trades turned into an eye-catching windfall has now become the country’s biggest copper bull, amassing a bet worth nearly $1 billion in a market jolted by escalating competition between the US and China.

A Chinese spy cozied up to a California city councilwoman — and helped to get the new “political star” elected in 2022 — to advance Beijing’s interests, the feds said. Yaoning “Mike” Sun, 65, will spend four years in prison after getting ...