Which tour group did the Koreans killed in the car accident in North China belong to?

On April 22, a major car accident occurred in North Yellow Sea Road, North Korea. A Jinlong tourist bus with the license plate number "Pyongyang 82- 1 105" traveled along the potholed and muddy road after the rain to Qingshui Bridge. Before getting on the bus, the body slipped out of control and instantly fell into the bottom of the bridge 30 meters deep. Only 38 people survived on board, while the remaining 32 tourists from China and four North Koreans were all killed.

The victims of this major car accident were Spark Tour Group (including Diao Weiming, manager of Spark Travel Agency); The biggest victim is 76 years old and the youngest is only 6 years old.