I Went to musemu tthe Shanghai Museum Today

You can also title your entry, "My experience visiting the Shanghai Museum". Your title is grammatically correct, but it's best to title your text to give a preview of what you're talking about. In your case, you're talking about your experiences going to the Shanghai Museum, so it's best to be as specific as possible.

I went to the Shanghai Museum to see an exhibition today.

You can also say, "I went to the Shanghai Museum today to see an exhibition."

I really likeenjoy this exhibition, because it not only exhibits a wealth of cultural relics but also gives a lot of historical background and. Not only that, I learned a lot/so much about the history and other related cultural relics.

You can strengthen your sentence by using other ways to say I really like, such as I enjoy. I also broke your sentence into two separate sentences to make your sentences more readable.

So much new knowledge went through my braiI learned lots of new information, and I felt exhausted when I gowent home.

I used the active voice (e.g., I learned lots of new information.) to show that you're actively learning about a topic that you didn't previously know. It's best to use the active voice except in cases where you don't know who the subject is.

I think it's a little cute.

OPTION A: Went to a musemum today OPTIONB: A museum visit

It'sCOMMENT: The original is okay. You could also combine the first 2 sentences into 1 sentence like this - ¶
Today I went to the Shanghai Museum to see an exhibition about anthe ancient Shu civilization called Shu.

I really liked this exhibition, because it not only exhibitsed a wealth of cultural relics but also gihaves a lot of historical background andon the related cultural relics.

SMOOTHER: So much new knowledge went through my brain, and that I felt exhausted when I gotgetting home.

[PictureHere is one of my favorite pictures from this exhibition: https://twitter.com/myplain_/status/1789635395006972096/photo/3] ¶
The one in the picture is my favorite today.¶

It's a bronze deity beast discovered in 2021, cast in msome time before than 1,000 B.C.

Went to musemum today

It'The exhibition was about an ancient civilization called Shu.

So there's no ambiguity in what "it" is referring to. "It" could either refer to the museum or the exhibition.

I really like this exhibition, because it not only exhibits a wealth of cultural relics but also gives a lot of historical background and related cultural relicsbout them.

Sorry if this isn't what you mean.

[Picture: https://twitter.com/myplain_/status/1789635395006972096/photo/3] ¶
The onerelic in the picture is my favorite from today.

Maybe move this sentence up so it comes after the sentence about cultural relics if you want to use "the one." "One" is used to refer to a noun without having to repeat the noun, but the previous sentence changes topic and makes it seem like we're going to stop talking about cultural relics, so now "one" here doesn't refer to anything.

It's a bronze deity beast discovered in 2021, cast in more thanbefore 1,000 BC.

"More than" is used for anything than can be quantified. 1,000 BC is a time.

Went to musemum today

So much new knowledge went through my brain, andso I felt exhausted when I got home.

or "my brain that I felt"

[Picture: https://twitter.com/myplain_/status/1789635395006972096/photo/3] ¶
The one in the picture is my favorite from today.

It's a bronze deity beast discovered in 2021, cast in moreearlier than 1,000 BC.

Went to a musemum today

It'The exhibition was about an ancient civilization called Shu.

I really like this exhibition, because it not only exhibits a wealth of cultural relics but also givepresents a lot of historical background and related cultural relics.

[Picture: https://twitter.com/myplain_/status/1789635395006972096/photo/3] ¶
The onerelic in the picture is my favorite tof the day.

It's of a bronze deity beast discovered in 2021, cast in more thanbut it was cast before 1,000 BC.

I think it's a littlekind of cute.