Immortality

Immortality or The Husky And His White Cat Shizun, is a live action base on a BL Novel. Sadly the drama wont be out until 2021 spring, but in the meantime you can listen to it's CD Drama and read the novel, it does have a Manhua but I haven't found any English translation or a place to read it.
If you also know and enjoyed Scum Villain Self-Saving System (another BL novel) then I would like to think you will enjoy this!
It follow our MC Mò Rán who's a disciple of Chu Wanning. In his past life he was the first Emperor of cultivation world, Taxian-jun. After his death he was reborn and transmigrated to the year when he first became a disciple of Sisheng Peak.

Similar BL drama, except it is a bromance. Xianxia drama, and loaded with angst and a lot of feels.

Both dramas debuting on 2021 and produced by tencent. Both comes after the success of the untamed signifying a golden age of danmei dramas. Both has Older uke and Younger seme. Both have quite the popularity amongst international danmei fans, often with the same audience.

Both of these series are bromance and beautifully contain beautiful moments between two male characters. Both have a historical and enigmatic genre and are related to the country's politics and court. And of course they are both wuxia.

Both are about two male leads and their strong bond (in reality it is a romantic relationship but has censorship). Both are wonderful stories about eternal love that lasts through much hardships and trials. Both semes are questionably evil (this is debatable for spoiler-y reasons) and both ukes are kind and good at heart. Both have a good amount of mystery, suffering, comedy, tragedy, (b)romance, and fantasy. If you really enjoyed H2A then you would absolutely love Heaven Official's Blessing (go and read the novel!).

Duan Mu Cui desce ao reino mortal e estabelece sua própria seita com a intenção de derrotar as forças demoníacas que procuram prejudicar os humanos.

Immortality is similar to flying Phoenixs because it’s also a bromance drama and might be similar to winner is king to.

Immortality similar to the society of the four leaves because it focus on main male leads and it’s also bromance but there hasn’t been any updates for when the dramas will air

It is not similat actually :D
Bu you should watch it .
Main roles luo yunxi and cheng xiao. Perfect visual couple. And the story is so good.

Both are Bromance dramas.
Both are about court, mystery, and action.
I'm adding them here in case you want to watch them.

1) Both have a male as main lead
2) Both are adapted from novels
3) Both are historical dramas
4) Both have a sense of romance
5) Both contains heavy use of CGI
6) Both somehow involve saving the world.

1) Both have two males as leads
2) Both are danmei or BL.
3) Both are adaptations of same sex novels
5) Both are period dramas
6) Both have censored same sex romance

Princess! You have five husbands! Is obviously a reverse harem drama. I love it. There is some romance between two guys in her harem though.

1) Both are censored same-sex dramas
2) Both are of the xianxia genre
3) Both have two males as leads
4) Both have a bit of mystery and wuxia
5) Both are adapted from boys' love novels.

This recommendation is based on the novel for both of the stories and plot may change (if) when it is aired (since censorship has a big role in Chinese dramas). Immortality and The Scum Villains Self-Saving System has a lot of similar aspects while it manages to maintain originality.

The similarities are

- Master (Teacher) / Disciple relationship
- Death and the reluctance in accepting it (I don't wanna give any spoilers)
- Both has a satisfying end (at least in my opinion).
- Having memories/information about the previous life
- Bromance

The differences are:

- SVSSS has the ML transmigrating into a novel and trying to survive in the role of a villain while supporting the original male lead from the novel, whereas Immortality is about the disciple trying to get revenge in relation to his last life.