[Solved] Schematic for Tang Nano 4k

I’m looking for the Tang Nano 4k board schematic. I found the pinout on aliexpress description but not the schematic.

Do you know where I could find this schematic in PDF format for example ?

Thank

Ok found it here : https://dl.sipeed.com/shareURL/TANG/Nano%204K/HDK/02_Schematic