The coronavirus is providing a lesson in how much the world’s car factories revolve around China.

Hyundai, the world’s fifth-largest automaker, said Tuesday that it was temporarily stopping production lines at its factories in South Korea because of shortages of Chinese parts.

The Hyundai shutdowns — the first factory lines to be idled outside China — could portend much more serious disruptions in the complex networks that supply automakers with essential components and materials.

Hyundai “decided to suspend its production lines from operating at its plants in Korea,” the company said in a statement. “The decision is due to disruptions in the supply of parts resulting from the coronavirus outbreak in China.”

President Trump’s trade war notwithstanding, the global economy remains highly interconnected and interdependent. Supply chains are finely tuned to deliver parts just as they are needed, so companies don’t need to waste money on big warehouses.