Visa for Belgian citizen

Hello,

I will have to travel several times to China for business purposes as well as tourism.
I am a Belgian citizen working in Japan.
I have prepared the application form (V.2013), I have an invitation letter from our company in China.
Do I have to go to the embassy? or can I send it by parcel?
if so, where should I send the documents to?
Thank you in advance for your support