About a week. The offer approval process takes about one week. Very large companies, especially foreign companies, run processes in a week, and there are many processes, which is normal. Since the first round of written test, the second round of technical interview and personnel interview have all passed, if you can join the job, you will work directly, and there will be no follow-up interview. Approval is generally to submit your resume and portfolio online, and at the same time, the company still has to go through a certain process to increase the number of people.