Dear.  µ¿±Ç

I'm happy to read your essay. :D

I think you're talking about Seonjo(¼±Á¶), not Sukjong(¼÷Á¾). Right?

Different people have different opinion about evaluation of historical figures.

Jagyeongnu was a self striking water clock.

It was invented Jang Yeong-sil during the Joseon Dynasty.

It was a great invention.

Thank you for your essay.

Have a good day~