restrictions in Muslim community including dietary and clothing; drinking alcohol and eating pork is sinful in Muslim community due to Quran. However, Korea’s soju export to Islamic countries are increasing, especially Indonesia, a largest Muslim community country, increased 10.1% from 2017. While Islamic countries enforce their dietary rules, they allow alcohol imports for the non-Muslims and foreigners living in Indonesia are permitted to not follow the Islamic dietary laws. Joseon period Study of the Huihui Lifa In the early Joseon period, the Islamic calendar served as a basis for calendar reform owing to its superior accuracy over the existing Chinese-based calendars. A Korean translation of the Huihui Lifa "Muslim System of Calendrical Astronomy", a text combining Chinese astronomy with the zij works of Jamal al-Din, was studied during the time of Sejong the Great in the 15th century. The tradition of Chinese-Islamic astronomy survived in Korea up until the early 19th century. Decree against the Huihui community In the year 1427, Sejong ordered a decree against the Huihui (Korean Muslim) community that had had special status and stipends since the Yuan dynasty. The Huihui were forced to abandon their headgear, to close down their "ceremonial hall" (Mosque in the city of Kaesong) and worship like everyone else. No further mention of Muslims exist during the era of the Joseon. Later periods Islam was practically non-existent in Korea by the 16th century and was re-introduced in the 20th century. It is believed that many of the religious practices and teachings did not survive. However, in the 19th century, Korean settlers in Manchuria came into contact with Islam once again. 20th-century re-introduction During the Korean War, Turkey sent a large number of troops to aid South Korea under the United Nations command called the Turkish Brigade. In addition to their contributions on the battlefield, the Turks also aided in humanitarian work, helping to operate war-time schools for war orphans. Shortly after the war, some Turks who were stationed in South Korea as UN peacekeepers began preaching Islam to Koreans. Early converts established the Korea Muslim Society(한국이슬람협회) in 1955, at which time the first South Korean mosque was erected at Imun-dong. The Korea Muslim Society grew large enough to become the Korea Muslim Federation in 1967. Today Islam in North Korea The Pew Research Center estimated that there were 3,000 Muslims in North Korea in 2010, up from 1,000 in 1990. The Iranian