(220119) -- ZHANGJIAKOU, Jan. 19, 2022 (Xinhua) -- China's National Ski Jumping Center, also known as "Snow Ruyi", is located in Zhangjiakou, co-host city for 2022 Beijing Winter Olympics, which will host competitions in Ski Jumping and Nordic Combined event, has a 'S-type' curve that resembles the shape of 'ruyi', a traditional Chinese ornamental object for luck. The National Ski Jumping Center has the longest ski jumping trail in the world and is the first ski jumping venue in line with international standards. From Dec. 3 to 5, 2021, "Snow Ruyi" hosted FIS Ski Jumping Continental Cup and FIS Nordic Combined Continental Cup, as the test events for the Beijing 2022. There are only 15 days countdown to Beijing 2022 Winter Olympics, China's National Ski Jumping Center gears up to welcome athletes from all over the world. Photo taken on Dec. 31, 2021 shows the National Ski Jumping Center in Chongli district of Zhangjiakou City in north China's Hebei Province. (Xinhua/Yang Shiyao)