How to get working permit in China?

There are two solutions on working permit application:
Solution 1: do the visa conversion without leaving China
1. apply a employment license;
2. apply a conversion from L/F to Z;
3. apply working permit;
4. apply a 1 year residence permit.

Solution 2: apply a working invitation letter
1. apply a employment license;
2. apply a working invitation letter and fly to HK or other country to apply a Z visa by the letter;
3. extend your Z visa;
4. apply a 1 year residence permit.

THAT'S CHINA Consulting Service Co., Ltd. is well recognized by its numerous clients for its professional, speedy services and useful information and suggestions provided.

Our Location and Contacts:
---By Subway: you could take Subway Line 2, get off at Dongzhimen station, and choose D-exit(Southwest exit), then go forward for about 100 meters, you could see the building named CYTS Plaza, we are in Room 707-708.
---By Taxi or drive by yourself: we are in the southwest corner of Dongzhimen Bridge, the inner of Second Ring(Er Huan Road), when you see Beijing Bank or China Mobile, then you should also see CYTS Plaza. Generally speaking, every taxi driver know our building, in Chinese, it's ZhongQingLv Dasha.

Our working time:
Monday to Friday: 8:00~19:00 (Normal working time, but even in the evening time, you can call us or email us);
Saturday to Sunday: also available, but you need to make an appointment with us.
Contacts:

Angie Zhang
Tel: +86-10-58156222-105
Mobile: +86-13810375918
Email/MSN: jiarong_zh@hotmail.com
Address: Room 707-708, CYTS Plaza, No.5 Dongzhimen South Avenue, Dongcheng District, Beijing, P.R.C