Hi Rico,
The Process is as below
1. Material Master lead time +
2. Transportation time
Both these calculated through the avaialablity check, from PP and SD modules configuration. The Time take from your location from China would be calculation from the Transportation module and the material avaialability depends on the lead time (which would be your production time for that material to be avaialble for you to ship it). The Lead time calculation depends on your MTO or MTS process in SD.
Thanks and regards,
R.Sudhir