If I want to ship out 3 boxes (approx 20kg per box) from China to Malaysia:

1. Do I need to specify whether to use surface or SAL? How do I say it in Chinese?
2. Where will our packages arrive? At our own country's postal office where we hv to collect ourselves or do they send it to our destination address?
3. Will we get any notification upon arrival of our packages?
4. How long does it normally take for packages to arrive from China to Malaysia?
5. If we are relocating back from China to Malaysia, will our packages that contain lots of personal clothes, shoes and books, be taxed at customs?
6. How do we fill up the packing list for clothes and value if they are old, personal clothes?
7. Is delivery through China Post reliable?

Hope someone can help answer my questions. Thank you very much in advance!