The cause of the explosion which occurred at Yibin Hengda Technology near the southwestern province of Sichuan is yet to be ascertained.
Industrial accidents are common in Pakistan with workplaces often forgoing basic safety measures and equipment in the absence of legislation to protect labourers.
The blast in Dangyang city in the central province of Hubei occured when a high-pressure steam pipe exploded, killing at least 21 and wounding another five people.
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