It's April 6th today, the QingMing Festival, so I didn't go to work. It's April 6th today, the QingMing Festival, so I didn't go to work.

The QingMing festival lasts from April 4th to 6th. The QingMing festival lasts from April 4th to 6th.

I asked for one day off: April 3rd, so now I have a four day holiday. I asked for one day off: April 3rd, so now I have a four day holiday.

I asked for onthe day off on April 3rd, so I have a four day holiday. I asked for the day off on April 3rd, so I have a four day holiday.

That is how I would say this.

I asked for one day off on April 3rd, so I have a four day holiday. I asked for one day off on April 3rd, so I have a four day holiday.

The first day I did some housework, walked my dog , picked up my daughter from school and whatnot;. The first day I did some housework, walked my dog, picked up my daughter from school and whatnot.

The first day I did some housework, walked my dog , picked up my daughter from school and whatnot;. The first day I did some housework, walked my dog , picked up my daughter from school and whatnot.

We don't end a sentence with a semicolon; it is used to join two independent clauses.

The first day I did some housework, walked my dog , picked up my daughter from school and whatnot; The first day I did some housework, walked my dog, picked up my daughter from school and whatnot;

The first day I did some housework, walked my dog , picked up my daughter from school and whatnot; The first day I did some housework, walked my dog , picked up my daughter from school and whatnot;

The second day, my family and I went to [the] Five Great Avenues which is a very famous sighte in TianJin. The second day, my family and I went to [the] Five Great Avenues which is a very famous site in TianJin.

This may or may not need "the." Maybe someone else will know. Some famous sites do have "the" and some don't. I don't know if there is a rule or pattern. A "sight" is something we see (sightseeing), but a "site" is a place. Although both could work for your sentence, I think "site" works best throughout the post, as you talk about the crowds in these places.

Tthe second day, my family and I went to the Five Great Avenues which is a very famous sight in TianJin. the second, my family and I went to the Five Great Avenues which is a very famous sight in TianJin.

No need for a Capital after a semicolon.

There were many beautiful flowers, but there were moreany people there, so it was very very crowded there. There were many beautiful flowers, but there were many people there, so it was very very crowded.

There were many beautiful flowers, [but there were more people there, so it was very very crowded there.] There were many beautiful flowers, [but there were more people there, so it was very very crowded there.]

This is an example of a sentence that just needs revising. A beginner would likely make two separate statements, and the correction would eliminate the repetition of "there." The correction might look like this: "There were many beautiful flowers, but there were also many people, so it was very, very crowded." But you are not a beginner, so you might consider ways to combine the two statements. "There were many beautiful flowers, but the site was too crowded to enjoy them." "There were many beautiful flowers, but the crowds of people prevented us from enjoying them." "There were many beautiful flowers, but we couldn't enjoy them because the site was extremely crowded."

There were many beautiful flowers, but there were even more people there, so it was very very crowded there. There were many beautiful flowers, but there were even more people there, so it was very very crowded there.

There were many beautiful flowers, but there were moreany people there, so it was overy very crowded there.crowded. There were many beautiful flowers, but there were many people there, so it was overcrowded.

Don’t need to repeat words so much.

We just stayed there for less than an hour and went to an electric car shopping;. We just stayed there for less than an hour and went to an electric car shop.

We just stayed there less than an hour and went to athen went electric car shopping; / shopping for an electric car. We stayed less than an hour and then went electric car shopping / shopping for an electric car.

Extra words can be eliminated, so what you want to say shines through clearly. I am guessing you mean that you went to look at electric cars that were for sale. We use "went shopping" ("go shopping") as a phrase without "to."

We just stayed there for less than an hour and went to an electric car shopping;. We just stayed there for less than an hour and went to an electric car shop.

We just stayed there less than an hour and went toshopping for an electric car. shopping; We just stayed there less than an hour and went shopping for an electric car.

The third day was Easter,: my wife and I went to XiKai church which is another famous sight in the morning. The third day was Easter: my wife and I went to XiKai church which is another famous sight in the morning.

The third day was Easter. In the morning, my wife and I went to XiKai church which is another famous sight in the morningte. The third day was Easter. In the morning, my wife and I went to XiKai church which is another famous site.

Two independent clauses must be separated into two sentences or joined with a conjunction or semicolon. "In the morning" at the beginning of the sentence functions as a transition between the two sentences and catches the reader's attention.

The third day was Easter, m. My wife and I went to XiKai church, which is another famous sight in the morning. The third day was Easter. My wife and I went to XiKai church, which is another famous sight in the morning.

The third day was Easter, and in the morning my wife and I went to XiKai church (which is another famous sight) in the morning. The third day was Easter, and in the morning my wife and I went to XiKai church (which is another famous sight) in the morning.

Either put in the morning earlier in the sentence or put brackets around as suggested for a bit of an aside and keep your structure as it is Putting morning earlier is preferable though.

We had planned to attend Mass but didn't expected there were also manyto be many people there too. We had planned to attend Mass but didn't expect there to be many people there too.

We had planned to attend Mass butand didn't expected there were also many many peopleould (also) be so many people at this site (as well / too). We had planned to attend Mass and didn't expect there would (also) be so many people at this site (as well / too).

Planning to attend Mass and not expecting crowds go together, so I would use "and" to join them, not "but." Another variation: "We didn't expect this site would also be overcrowded, and we had planned to attend Mass."

We had planned to attend Mass, but didn't expected there were also manyould be so many people. We had planned to attend Mass, but didn't expect there would be so many people.

We had planned to attend Mass but didn't expected there were also manyto be so many people. We had planned to attend Mass but didn't expected there to be so many people.

We couldn't get into the church and went home with disappointmented. We couldn't get into the church and went home disappointed.

We couldn't get into the church and went home within disappointment. We couldn't get into the church and went home in disappointment.

"in" is commonly used in these phrases that describe negative emotions: "in disappointment, in despair, in resignation, in anger, in frustration," etc.

We couldn't get into the church and went home with disappointmented. We couldn't get into the church and went home disappointed.

We couldn't get into the church and went home with disappointment.ed. We couldn't get into the church and went home with disappointed.

The structure like “with dissatisfaction”, “with happiness”, “with disappointment” isn’t very common you usually just use an adjective. You went home disappointed

Today is the fourth day,. I took my family and my dog to the suburbs this morning. Today is the fourth day. I took my family and my dog to the suburbs this morning.

Today is the fourth day,. I took my family and my dog to the suburbs this morning. Today is the fourth day. I took my family and my dog to the suburbs this morning.

Two independent clauses. Here, "I took my family" is new info, so it makes sense to put "this morning" at the end, because it is less important.

Today is the fourth day,; I took my family and my dog to the suburbs this morning. Today is the fourth day; I took my family and my dog to the suburbs this morning.

We all liked the fresh air and wide grass there and played happily for over 3 hours. We all liked the fresh air and wide grass there and played happily for over 3 hours.

We all liked the fresh air and wide grasgrassy meadows there, and we played happily for over 3three hours. We all liked the fresh air and grassy meadows there, and we played happily for over three hours.

Grass itself isn't usually described as "wide" unless you are measuring the width of a single blade of grass, perhaps to compare types of grass. The space or place where the grass is growing can be wide. So you might say "wide open fields of grass" or "a wide meadow of grass." You can also say "a grassy field / a grassy meadow" or "fields/meadows of grass" or if you want to include "wide" you could say "grass filled, wide open spaces." Meadows can also be filled with wildflowers, so that is why you would add "grass/grassy." If you just say "wide open fields/meadows," some readers will visualize grass, but some may visualize a crop growing in the meadow (grass for hay), and others may visualize a meadow of flowers.

We all liked the fresh air and widall the grass there and played happily for over 3hours. We all liked the fresh air and all the grass there and played happily for over 3hours.

Wide doesn’t make a lot of sense, more like all the grass or wide open fields etc.

I don't want to go to famous sightes during holidays anymore, instead I'd like to enjoy the nature. I don't want to go to famous sites during holidays anymore, instead I'd like to enjoy nature.

Nature doesn't have "the" in front of it. It refers to the entire natural world.

I don't want to go to famous sights during holidays anymore, instead I'd like to enjoy the nature. I don't want to go to famous sights during holidays anymore, instead I'd like to enjoy the nature.

Same