My country - China

I would like introduce my motherland, China, to you. China is a historical country, since the Xiang dynasty in about 20 BC to recent Qing dynasty. It spans almost 5000 years.
China has 8 cuisines.  Of all of these, I think Sichuan cuisine is best of them. Chefs blend many spices together to create various flavors, inculding hot and sour sauce, tasty fish-flavour sauce, numbingly spicy sauce and so on. You know, there is a saying that China has food and Sichuan has flavor.
I live in the northeast of china. It's cold in winter and hot in summer there. In winter, my hometown is just like the heaven of snow.
Welcome to China. I am here waiting for you to visit my beautiful country.

[Good work.  Remember that cities and place names are proper nouns and capitalized.  Also put a space after all commas, periods and question marks.]

My country-China

I wanna introduce my motherland—China to you.China is a historical country,since xia dynasty in about BC20c to Qing dynasty.It acrosses almost 5000 years.
China has 8 cuisines,i think sichuan cuisine is best of them.Chefs blend many speices together to create various flavors,inculding hot and sour sauce,tasty fish-flavour sauce,numbingly spicy sauce and so on.You know,there is a saying that China has food and sichuan has flavor.
I live in northeast of china,its cold in winter and hot in summer.In winter,my hometown is just like the heaven of snow.
Welcome to china.I am here waiting for you to visit my beautiful country.