SHANGHAI — Some docks in China are clogged with arriving shipping containers or iron ore. Warehouses overflow with goods that cannot be exported for lack of trucks. And many factories are idle because components are not reaching them.

As Beijing tries to jump-start an economy hobbled by its coronavirus epidemic, one of the biggest obstacles lies in the country’s half-paralyzed logistics industry. China has some of the world’s biggest and newest seaports and airports, but using them has become a lot harder because of roadblocks, quarantines and factory closings.

Global shipping has been one of the biggest casualties. More tonnage of container ships is idled around the world now than during the global financial crisis, according to Alphaliner, a shipping data service.

Daily charter rates for tankers and bulk freighters have plummeted more than 70 percent since early January as China buys less oil, iron ore and coal, said Tim Huxley, the chief executive of Mandarin Shipping, a Hong Kong-based freighter shipping line.