Abandoned Crown Princess: Ji Jiu’er

They're all from my list of romance/ angst novel recs here:
https://catharcity.wordpress.com/romanceangst-novel-recommendations/

Most of them are not on novelupdates because no one's translated them. Probably because few people read angst and fewer read tragedies, so only the most famous tragedies like Hua Xu Yin/ Eastern Palace/ Tong Hua & Fei Wo Si Cun's books etc have been translated. I'm not sure which of the novels I rec'ed have been translated since I read the chinese text.

Chinese. The title is 太子弃妃：青楼季九儿 by 如果囧 

Nothing is as it seems refers to Gongzi Ce's marriage with Yun Su. Ji Jiu'er is not someone important. But Gongzi Ce only married Yun Su because she used her family's power to coerce him; first by helping him to usurp the seat of the Crown Prince, then leveraging on her threats to force him to marry her.

Yun Su and Xiao Liangchen kind of got together, but not quite. Xiao Liangchen begged Gongzi Ce to let Yun Su free (after all she & the Yun family did against him & Ji Jiu'er)... Yun Su was the villain of this story, so I don't think she deserved a good ending. >.<

It's a happy ending for Ji Jiu'er and Gongzi Ce. The book is relatively long. The first half is a flashback to their youth, the second from when Ji Jiu'er receives Gongzi Ce's letter of divorce. The second half is quite political.

The angst is 4/5 mostly because the author writes in a very tear-jerker style, but this book is not heavy/ depressing like Shattered Glass. Mostly because we know that the ending is going to be happy, so it's just a long journey before we get there. But we don't ever feel the same sense of helplessness/ hopelessness like in tragedies.  

Thanks for the raws! And lol wouldn't have expected an author who wrote a tragedy to have that kind of username  

Can someone give the summary of the whole story? Also where are you getting these novels from? I can’t seem to find most of them on novelupdates,. 

What was the original language for this? If it's Chinese, can you please include the raw name here? 

How did ML deal with Yun Su? And what happened after MC receive the divorce letter? 

How did they get married? I thought he married Yun Su so when and why did he marry Ji Jiu'er?