(Yicai Global) July 21 -- Record rainfall and flooding has brought much of central Henan province to a standstill, affecting industries based in the region.

Electric busmaker Zhengzhou Yutong Bus suspended manufacturing on July 21, it said. At present there is no flooding inside the plant but there is sludge, a staff member told Yicai Global.

Henan is home to 91 companies listed on the mainland’s stock markets, 31 of which are located in the provincial capital of Zhengzhou, according to financial website 10jqka.com.

The rain has caused some parts of production to halt and the firm is still calculating the damage caused, said a staff member at Henan Taloph Pharmaceutical Stock.

Some employees were unable to come to work today but overall business continues as normal, an employee at diagnostic product developer Autobio Diagnostics said.

Muyuan Foods has no pig farms in or near Zhengzhou where the rainfall is concentrated, China’s biggest pig breeder said.

Henan Yuguang Gold Lead's factory in Jiyuan near Zhengzhou was unaffected as the city is located higher up, the country's biggest silver maker said.

Editors: Zhang Yushuo, Kim Taylor