For those who don't have money to buy the offline SAS online tutor packages.

From SAS中文论坛

http://www.mysas.net/forum/viewtopic.php?f=6&t=2206

You can get free online access of:

1. SAS OnlineTutor: Basic and Intermediate SAS

2. SAS OnlineTutor: Advanced SAS

3. SAS Certification Prep Guide: Base Programming for SAS9