4 yuan 1 hour. According to the parking lot standard of RT Mart, Zhangzhou in 2022, the parking lot charging standard is tentatively set as free parking for 2 hours above 50 yuan with shopping receipt, free parking for 2 hours below 50 yuan 1 hour, and free parking for vehicles that have not shopped beyond the free time limit 1 hour. A parking lot is a place for vehicles to park. There are simple parking lots that only delimit parking spaces, and there are also paid parking lots equipped with entrance and exit gates, parking administrators and time cashiers.