Ti02

Yeah he knows, its his kid, that's why he is the crown prince! They don't have a bond ever in the novel!

FL was locked in the room two times, once it was fake, it was plan of her and ML to show ML hates her, that was really funny, in the novel there were really good scenes!
Another was serious, ML's injuries flared up, he was uncontrollable, he was angry FL went out of the palace and was almost kidnapped by Prince Duan so he told guards to lock her up, and to kill all the guards of FL because they failed protecting her! He was not normal then. But 15 minutes later he came back to his sense, like it was like a split personality, he stopped the killing of her guards, freed FL, apologized everything!
The drama gets dark in some parts, but everything was handled well in the novel!
The dude Bai something, he is like a spy for ML. He later likes FL but FL rejected him, its not that serious, its funny, he is a good person!
Empress will be defeated by 18-19 as per emojis, but Prince Duan will be till the end! He is the main villain, will be defeated for sure!

ML told her everything in the novel via a letter. It was handled well. But high chance they will omit this part in the novel, I cannot guarantee, but maybe they will indicate and not directly say, again censorship, I don't know how dark they want it to be as well!

The person is so weird, like I get everyone has their favs, but what kind of begging for roles for your fav is this! As if Esther Yu would have appreciated this!

ML was a teenager when he was drugged and forced/SA to have a kid with a maid. His step mother has orchestrated the entire thing! The maid was then killed after crown prince was born! She controls the crown prince and manipulates him!

SFL is a 2D transmigrator, so after she dies she goes back maybe to the 2D real world! Again this was not said in the novel. When she dies she died, her story ends, she was never mentioned again!
FL transmigrates back to the subway. But ML is not in the subway. They meet 2 days later in ML's company where ML is the CEO now!
You can say FL lived alone in the novel world for 10-15 years, because ML has to grow up in the real world to come up to her age! But this was like an epilogue in the novel. Like they just wrote a paragraph that FL and ML lived happily for a long time after which ML died and transmigrated back to the real life in his school in his maths class with all memories intact. Then after years, FL died and she transmigrated back to the subway. Then they wrote 2 chapters about their real life, in which in the first chapter they try to find each other, in the second chapter they meet and reunite!
In the real life, FL sees a drama being adapted based of the novel, where the characters of Prince Duan and Yonger are being played by the same people who were in the novel world!

It depends how much of spoilers do you want! All the decisions being ML is not purely correct, because you can see he does not have much power in court, there are factions of ministers with Empress and Duan. Plus there are many things that happened, while he was growing up! I would not say he is not a tyrant, he did not punish innocent people, but everything had a reason! His personality being like that has a reason! Its not very white or black. But if you are just concerned about the ending! Don't worry be it the fictional world or the real world, the couple will get a happy ending, and it will be completely legal and age appropriate!
(again this is what the novel follows, if the drama changes few things later, it might be different, though till now it doesn't seem the case)

To make the audience understand that its his own biological child, I guess they made the same actor play it!

There is a lot of comedy especially in the first few episodes! But then there is a perfect balance of comedy and seriousness, later episodes, also have a dark touch! You can say there is a balance, but comedy will always be a part of it!

You know, drama would just show that its a dream, we all know China censorship rules! But even the novel did not focus on that part much! Its a different story! 100% he suffered, fought! But I think he knew a lot about the modern world now, through FL and kept remembering her and hoped to see her soon, that made him determined! Also that's another season to have that story, this one is all about their survival!
Till now the script is almost identical to the novel! They have really adapted well! As I was saying few days back, some people criticized the makeup, but in the novel it was mentioned how FL used to have a lot of makeup in first few episodes, later toning it down a little, but it was always supposed to be a lot!

Its sad but bearable! ML and FL live together for a very long time, grow old together, but ML dies first. Because ML transmigrated as a kid, he goes back being a kid but now with all memories, cheatcodes gives by FL about modern world, adult maturity everything. He grows up there waits for FL becoming a CEO. FL lives in the novel world, missing him but it was bearable because they knew they will meet again. Then she transmigrates back to the subway. They meet and reunite!

There is no secret, some people misunderstood! There is no supernatural element here. People thought how does ML know everything about this world, when FL doesn't know, both being transmigrators! But by ep 10, now I think it has been cleared for everyone! ML is a transmigrator, but he transmigrated 15 years back when he was a child, hence he knows everything about the world, because he is the person ruling the kingdom since more than a decade!

FL never tried to drown her. SFL was not even drowned. Just according to the script, SFL read, before either of their transmigration the villain consort Wanyin tried to drown the naive Yonger. So SFL feels that she can do it again, she doesn't know it yet that just like her, even she is transmigrated and hence wants to survive!
Nope once dead SFL doesn't come back, there is no such scope! They will make amends before and be friends, but SFL dies!
The drama is abiding by the novel, hence hopefully they will abide by the ending of it as well, so everything should be fine!

ML was drugged to have a child with a maid, when he was himself a teenager, by his step mother!

Transmigration and Cheng Lei have to be my favourite things ever, for sure I am here, hehe!
No don't worry, nothing will break them up! They are throughout very steady if they follow the novel! There are few angsty parts, but things are manageable, like they do solve everything together!

This person was also in the page of "How Dare You" and said Esther Yu should be the lead role there as well! Bro, Esther Yu does work, let her breathe as well, she cannot do every role, stop rage baiting! Even without Esther Yu the dramas are doing fantastic, concentrate on her dramas if you like her, don't seek attention here!

If the emoji in ep 26-27, is a letter, then it can be! Its not very clear though! What I am confident is, it doesn't happen till ep 20 (due to the emojis). Do you want to know anything more?

No ML and FL are not 2D characters.

OG ML means Prince Duan? This is you know a twist! You can say like perception! When we see something, we believe in that, we feel its correct from our judgement! OG ML or our ML no one was good, both had difficult circumstances more or less! Its like you know what we see is not always true! The original script just focused on the fact that there was a tyrant, to defeat him OG ML did everything, but how he did it, if he took some bad steps, that was not in consideration, but that's his story to say!
I think the proverb that works here, is Until the lion learns to write, every story will glorify the hunter!
On a side note- He might have been the good guy if no one transmigrated. But because FL transmigrated, she became the real FL from just a supporting villain character, hence the real ML also changed! Like FL's transmigration changed the entire novel, hence altering characters!

Also there are somethings which aren't revealed yet! He was drugged, poisoned (hence the headaches), even as a child himself forced to have a child with a maid! ML was tormented growing up!
Exactly as you said, so true!