CJK characters
Chinese is written almost exclusively in Chinese characters. It requires over 3,000 characters for general literacy, but up to 40,000 characters for reasonably complete coverage. Japanese uses fewer characters — general literacy in Japanese can be expected with 1,945 characters. The use of Chinese characters in Korea is becoming increasingly rare, although idiosyncratic use of Chinese characters in proper names requires knowledge (and therefore availability) of many more characters. However, even today, students in South Korea are taught 1,800 characters.
Holy Emperor Guan's True Scripture to Awaken the World
"The True Scripture to Awaken the World" is written in simple Classical Chinese, and on the whole it doesn't contain more than 700 Chinese characters. In the first twelve lines, its writing style follows the three-character rule that is popular among other educational Chinese classics, such as "Three Character Classic" and "Standards for being a Good Pupil and Child", then it expands to the four-character rule of Chinese idioms, also known as Chengyu. Usually accompanying the scripture are examples of those who have benefited from the scripture.