Hangul and Hanja are used in Korea's writing system. They are both somewhat similar but Halgul is a lot less complicated and complex than Hanja

The Constants itself has absolute no meaning, and same goes for the vowels. The constants Give the word the root sound. But the vowels added to the constants makes it an actual word. Hangul is also written by the way your mouth moves when you pronounce the words.

For example,
ㅂ
Is nothing by itself. But the vowel:
ㅏ
Added to it, makes it:
바
Which means: Look/see

Here is an Example of Hangul:

ㄱ (giyeok)
ㄴ (nieun)
ㄷ (digeut)
ㄹ (rieul)
ㅁ (mieum)
ㅂ (bieup)
ㅅ (siot)
ㅇ (ieung)
ㅈ (jieut)
ㅊ (chieut)
ㅋ (kieuk)
ㅌ (tieut)
ㅍ (pieup)
ㅎ (hieut)

ㅏ (a)
ㅐ (ae)
ㅓ (eo)
ㅔ (e)
ㅗ (o)
ㅜ (u)
一 (eu)


Hanjs is a mix between Chineese Words and Korean Words. The same rules with the solo constants and vowels goes for this form of writing too.

Here's an Example of Hanja:

letter: 片紙
tissue: 休紙
gift: 膳物
bill: 外上
dining table: 食卓
cheque: 手票
name card,business card: 名啣
maid: 食母
prohibit, cancel: 休止
work: 工夫
very: 大端
prisoner: 囚徒
side room: 舍廊, 斜廊

Any further requests, Feel free to ask!