Like any other children in my village, I liked the sweet potato harvest season sovery much.

After villagers have harvested the sweet potatoes, there wereould still be sweet potatoes remaining in the fields.

We children liked to digenjoyed digging up the sweet potatoes out and bakeing them in the field to eat.

AtBy that timen, the weather had already become a little cold, and we had to wear a thick coats to staykeep warm.

When we children dug outup the sweet potatoes and baked them, we would often saw the geese flying in the high sky flying southward.

We could even hear their chirphonking.

Somehow, I felt like they chirped a little sadtheir honking felt somber.

We justonly have heard from adults that the geese were very big, and their meat was sovery delicious.

However, heawords wasere just heawords, we have never saween a real goose, let alone eat goose meaten one.

Sometimes, we mayight hear someone saying that a goose was ill, fell from the sky and was caught by somebody, but we never knew whether or not the story was true (or not).

I have left the countryside for many years ago.

Living in the city, I haven't seen any geese even once.

Sweet potatoes were one of the crops that farmers (largely) planted (in large quantities) every year.

“Largely” means “mostly.” It means they planted them most years, but not every year. I wonder if you might mean “planted in large quantities” instead.

Like other children in my village, I liked the sweet potato harvest season so much (very much).

Using “so much” in this way is OK in informal writing.

After the villagers harvested the sweet potatoes, there were still sweet potatoes remaining in the fields.

We children liked to dig the sweet potatoes out (up) and bake them in the field to eat.

At that time, the weather had already become a little cold, and we had to wear a thick coats to stay warm.

When we children dug outup the sweet potatoes and baked them, we often saw the geese high in the high sky flying south.

We could even hear their chirphonking.

They flew in the shape of a herringbone (a vee) high in the high sky.

We call that shape a “vee” (like the letter V).

Somehow, I felt like they chirptheir honking sounded a little sad.

We just heard from adults that the geese were very big, and their meat was sovery delicious.

However, heard was just heard, we never saw a real goose, let alone eate goose meat.

Sometimes, we may heard someone saying that a goose was ill, fell from the sky and was caught by somebody, but we never knew whether or not the story was true.

I have leftbeen away from the countryside for many years.

or: I left (or moved away from) the countryside many years ago.

Like other children in my village, I liked the sweet potato harvest season sovery much.

After villagers harvested the sweet potatoes, there were still sweet potatoes remaining in the fields.

We children likused to dig up the sweet potatoes out and bake them in the field to eat.

At that time (By then), the weather had already become a little cold, and we had to wear a thick coats to stay (keep) warm.

When we children dug outup the sweet potatoes and baked them, we often saw the geese flying south in the high sky flying south.

We could even hear their chirphonking.

I think that geese honk or hiss! Although, I am not quite sure. Chirping is a bit different - it's those little whistle-like singing sounds from birds that sing. It's the short and sharp high-pitched sound.

Somehow, I felt like they chirpedhonked a little sadly.¶
Somehow, I felt like their honking was a little sad.

However, heard was justBut what we heard was only what we heard, and we never saw a real goose, let alone eate goose meat.

Sometimes, we mayight have heard someone saying that a goose was illsick, fell from the sky and was caught by somebodyone, but we never knew whether or notif the story was true or not.

Living in the city, I haven't seen geese even onc've never seen a goose.

The perfect tense kind of implies that something hasn't happened even once. :)