What is the China's default packages source?

[fisheep]

Hi,

 

My nas is Japanese version,

I want to install some software from China region.

(sush as owapp, Phddns)

I found this url and can install manually,

(https://archive.synology.com/download/Package/spk/)

 

But how can I add as Packages Source in "Package Center",

So I can search and install it directly?

 

Thanks.