Main growth refers to a craftsman with casting technology who melts iron into a mold to make the desired items. During the Joseon Dynasty, the main growth was centered on light factories where weapons and metal types were made at military bases and main bases. When the factory plan was abolished after the reign of King Yeongjo and King Jeongjo, a private owner of the company emerged from the 17th century. They were responsible for the demand for Buddhist bells, vaults, incense burners, shrines, and runners, and from the 19th century, they gradually declined. Later, during the Korean Empire, the main growth was almost cut off, but rather, Japanese colonial era gradually revived due to increased demand for castings due to the production of military supplies.

Park Han-jong, the main growth function holder, entered the main growth business at the age of 16 and has a long career of about 50 years. The main growth of the Busan area is said to have originated from Kim Seok-gon, the main growth engine of Busan, who founded Beomjongsa Temple in Japanese colonial era. Kim Seok-gon's master craft led to Kim Kwae-jae, who was active in the early 20th century, and Kim Seok-jeong, who ran Cheongjongsa Temple, and Park Han-jong received the master craft from the two men. Since 1987, he has inherited his master, Kim Seok-jeong's Jujong Workshop and renamed it Hongjongsa.

In the meantime, 200 households with less than 1,000 pipes and 10 households with more than 2,000 pipes were selected. Some of the more than 2,000 representative works include Daebeomjong (1991), Daebeomjong (1996), Busan Citizens' Bell (1999), Gimcheon Citizens' Daejong (1999), Shin Eo Beomjong (2001), and Bongnyeongsa (2002) in Suwon.

Park Han-jong's method of casting the bronze bell is based on the traditional Korean technique of casting death penalty, in which half of the life-long sections are modeled and the molds of the inner and outer shapes are constructed and cast separately using a huge rotating shaft. Moreover, the precision casting technique of the Sangwonsa Temple, which was not clear about manufacturing techniques, was reproduced in the traditional way of casting death, allowing it to inherit the mystique of the Korean species, which is highly praised for its excellent sound and pattern beauty.