China-made Tesla Model 3 vehicles are seen during a delivery event at its factory in Shanghai on Jan 7, 2020. [Photo/Agencies]

American companies with operations in China are striving to resume work amid the coronavirus outbreak, according to a Tuesday report from financial news outlet Yicai.

At electric car maker Tesla's gigafactory in Shanghai, more than 1,000 employees have returned to work, accounting for one-third of its total employees, the report said. After resumption, production capacity can be restored by 50 to 60 percent, and it is expected to take one month to achieve full capacity recovery.

Honeywell, a US-based conglomerate providing a wide range of commercial goods and engineering services, said its 21 factories in China have all resumed work, and some factories have reached 100 percent resumption, according to the report.

Tech giant Apple is facing a slower-than-anticipated return to production and iPhone supply will be temporarily constrained, according to a statement from the company on Feb 17.