It’s a holiday today again.
>> Today is a holiday again.
OR >> It's another holiday.
The day of this national holiday is the Hangul Proclamation Day or just Hangul Day.
>> CORRECT! 
*Today
Hangul, the current Korean official language, was made by Sejong Great King of Chosun dynasty about 570 years ago.
>> CORRECT! 
*King Sejong the great during the Chosun dynasty, about 570 years ago.
In 9th of October, 1446, the great king finally proclaimed the creation of Hangul.
>> CORRECT! 
*On Octobe 9, 1446
For the last several years, not only the king, but also a lot of their retainers and scholars had put their energy to create it.
>> CORRECT! 
However, at that time, not every people in Chosun liked the creation of Hangul.
>> CORRECT! 
Before the proclamation of Hangul, they had used Chinese letters and they blindly believed that it is the best letters in the world.
>> CORRECT! 
*alphabet
So, they regarded Hangul as just the lowest class of people’s letter.
>> CORRECT! 
*alphabet
Anyway, due to the king’s achievement, now we can use very easy letter.
>> CORRECT! 
*an easier alphabet
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