Can I change jobs with a work visa?

The work visa is bound to the employer's COS number. If a customer loses his/her job for any reason, he/she needs to re-apply for a COS number, and apply to the Immigration Bureau to renew his/her work visa when he/she finds a new employer (people don't need to return to China), but it should be noted that the term of the work visa remains continuous and valid. /zd/xx