Chinese numerals
Korean numerals "susa" (also called "semssi") include two regularly used sets: a native Korean set and a Sino-Korean set. The Sino-Korean system is nearly entirely based on the Chinese numerals. The distinction between the two numeral systems is very important. Everything that can be counted will use one of the two systems, but seldom both. The grouping of large numbers in Korean follows the Chinese tradition of myriads (10,000) rather than thousands (1,000) as is common in Europe and North America.