In the following process, how long does STEP #4 alone takes? AEL and other docs are already available.

1. Before the employee entering china, the employer should apply for Employment License first in municipal Labor and Social Security Bureau Reception Center of Employment Affairs of Foreigners. 5 work days /no charge
2. The employer shall apply a letter of Z visa notification go through formalities. 3work days/￥20
3. The employer shall mail the document above and original Employment License to the employee oversea.
4. The employee shall apply forthwith for Z vise at Chinese embassy/consulate/Vise office in Employee’ nation with a letter of Z visa notification and original Employment License, and other required document of government within 30 days from date of the letter issue.

Thanks!