It started from bank interest high age. 70% of the house rental in Korea is on Jeon-se basis. If the sale price of the house is 100, the Jeon-Se amount is normally around 60~80% of the sale price. In Jeon-Se system, the tenant makes a deposit around 40%~90% of the sale price as the security and takes back the same amount when the lease contract is expired. There is no monthly rental payment.