I work for Crown Relocations here in Nanjing and would like to provide some advice in regards to moving. Every time a person moves, it is very important to ask the relocation company for a survey to gauge the amount of goods (or volume like Cleo said below) you may need to relocate. The survey is a free estimate performed in your home. When it is a move overseas, we also advise you on customs exporting from China and the destination country. This is important since every country has different restrictions which may cause duties (or fines).
In regards to a move within China or domestic move, distance does matter which of course means a move to Shanghai would be cheaper than a move to Guangzhou.
I suggest you have a survey performed because every move is different and there is no one lump sum cost. Just like the price for a move to Shanghai and Guangzhou are different, so is a move from China to Germany or the US (as well as different cities).
If you have any questions for your move, you can contact me.
Ron Collins 136 115 800 56