One day the respected Comrade Kim Jong Un visited the completed Rungna Water Park. In a changing room, he took a look at the keys with number tags inserted in every chest. Staring at the keys for a while, he asked the officials where the people to use the water park keep their keys after putting their clothes and belongings in the chests and locking them. One of the officials gave his opinion. Hearing the answer, the respected Comrade Kim Jong Un cast his eyes to the chests again. After some time in thought, he pointed at the watch strap around his wrist, explaining that keys should be fixed to the rubber straps like watch straps so that people could enjoy themselves conveniently carrying their keys around their ankles or wrists. Then, he took urgent measures for promoting people’s convenience by providing rubber straps to the water park.