eliteles1

His part starts to get important after a few episodes (even though he is just the main protagonist's friend). He already showed here his heroism and ability to fight magic (he is better at this than the other characters). (His way of making that magic shield in "Love and Redemption" I remembered him a lot in "Noble Aspirations / Legend of Chusen).

trailer (drama The Promise of Chang’an (2020)
https://youtu.be/9jnCordvEfU
It looks like one of the nine past lives he (Cheng Yi (character Sifeng) lived (which was shown briefly) in the drama Love and Redemption (2020). (And now we can see in detail.)
P.S:
Four actors from "Love and Redemption" are here (the ones who play the characters (Si Feng, Wi Zi Qui, Brother Liu and Madam Dong Fang)

trailer (drama The Promise of Chang’an (2020)
https://youtu.be/9jnCordvEfU
It looks like one of the nine past lives he (Cheng Yi (character Sifeng) lived (which was shown briefly) in the drama Love and Redemption (2020). (And now we can see in detail.)

(Meng Xing Chang An (2021))
https://www.youtube.com/watch?v=nyuu_U7JcoE
Cheng Yi (Si Feng), our "Love and Redemption" hero wears the warrior armor again in hist next drama.

https://www.sohu.com/a/405091561_541020
Launch of this drama, with costume photos. (Use google translater).

https://www.youtube.com/watch?v=43ILJk4EtIM
("Love and Redemption" actors in this new drama.)

https://www.youtube.com/watch?v=qNETC3M8cjk
(Beginning of filming) Cheng Yi at the head of the cast.)
010720 Dream pf Chang'an 梦醒长安 ，成毅Chengyi ，张予曦，宣璐

https://www.youtube.com/watch?v=nyuu_U7JcoE
Cheng Yi (Si Feng), our "Love and Redemption" hero wears the warrior armor again.

Yes, definitely.

Ummm....!

But ... Xuanji even with a glass heart shows affection and concern for Si Feng.

Welcome !

Your interpretation of this couple may be correct. Makes sense.

Me too. I stopped other dramas because I need to complete "Love and Redemption" first.

https://www.youtube.com/watch?v=9gwCTMfLboY
spoilers (episodes 54-59) Behind scenes.

https://www.youtube.com/watch?v=-twoNww7mxU
Interview with subtitles. (Cheng Yi (Si Feng) and Cristal Yuan (Chu Xuanji).

I don't know.

Full OST || Love and Redemption OST / 琉璃美人煞 OST
https://www.youtube.com/watch?v=SQPq3CM40b0

3- Mochaxing and LHDI (Chu Xuanji)
The part where Si Feng fell in love is the woman part. (And he knows everything about Chu Xuanji, he was the one who smeared the wall that revealed the other half of Chu Xuanji.) And the moment when he pretends to be Mochaxing, where he broke her heart, then he saved her using his 12 feathers on his wings. And he said, "NOW YOU WILL ONLY BE CHU XUANJI". This already gives you the answer you are looking for.

Yes, he melted her glass heart. (the colored glass of the original title). Perhaps this color should indicate happiness, right?

This drama is so interesting. There are so many interesting and beautiful-looking characters. But other than that, there are many battle scenes, magical powers so technically constructed, as I have never seen in any drama. (and the love story. I love a love story, of a beautiful man totally in love with his beloved. And this hero died in 9 past lives for her. He is so tender, dignified, and fearless.
P.S: I think it started to get interesting from the first episode. One episode took me to the next.

Me too. I haven't seen anything yet to justify the amount of love she has for him. She looks more like someone than begging for a crumb of his love.

I want to watch Lost Tomb 2, Cheng Yi (Si Feng) and Liu Xue Yi (Hao Chen) are in this 2019 adventure drama.
https://www.youtube.com/watch?v=3bqciCAVDfU
behind scenes:
https://www.youtube.com/watch?v=0r4qVEU2q5E

Yes, I also love her overprotection for him. I don't think he had ever had that in 9 past lives. Now you have all of her love, Si Feng.