how to get working visa for china to work at least 3-5 years

For applying a Z, you need to provide your valid passport, an application form, a recent taken photo, your invitation letter from your company, your work permit and your personal statement. Then you need to apply through the nearby CVASC.

After you get the Work Z, you need to change it to a resident permit within 30 days after you enter China. Then you can stay in China for a long time and your resident permit may needs to renew every year at first and later the validity will be longer.