BEIJING, Jan. 19 -- Medical instrument enterprises must hire staff to monitor the quality of production and distribution, said a regulation published on the China Food and Drug Administration website on Monday.

There must also be member of staff to cooperate with supervision institutions investigating malpractice. To guarantee quality, businesses must make improvements in procurement, inspection and acceptance, storage, transportation and after-sales service, the regulation said.

Sales of instruments with quality problems should be stopped as soon as problems are found and businesses keep proper procurement records.

Effective after-sales service should guarantee the safe use of such instruments.