Can someone help me to make an account in csdn

Mecmen

i have tried everthing possible from my end, but the entire site is very confusing. I have sent emails to their support but no respnse maybe becuse they dont speak chinese.
I have also downloaded the app with no success. I will be very grateful if anyone can help. I want to download books from that website

Mecmen

this is the link to the books i wanna download. please can anyone help me. it will be highly appriciated. Thank you
https://download.csdn.net/download/gzhuichou/11238006
https://download.csdn.net/download/m0_38074927/11566798
https://download.csdn.net/download/jack_zhao_/10623987
https://download.csdn.net/download/weixin_45736949/11851692