After internal discussing with Marco and Hayati, the important information for ASPAC and head office at Vienna is material group. Therefore, you are free to create your materials when necessary. But:
1. All material no must be started with CS.
2. All material description must be started with CS.
3. The free text at PO line must be started with CS if no material no is used.
The user manual for creating material no is attached. please make sure to use correct material group and valuation class at material master.