![Holmenkollen Ski Jump in Holmenkollen National Ski Arena is pictured in Oslo, Norway November 28, 2018. The ski jump is clad with a mesh of stainless steel and rises 58 meters in the air. (Photo/Agencies)](http://www.ecns.cn/hd/2018/11/30/7cef8ffb65a64c8b9514b14026985684.jpg)
Holmenkollen Ski Jump in Holmenkollen National Ski Arena is pictured in Oslo, Norway November 28, 2018. The ski jump is clad with a mesh of stainless steel and rises 58 meters in the air. (Photo/Agencies)
![A snow cannon is seen at Holmenkollen Ski Jump in Holmenkollen National Ski Arena in Oslo, Norway November 28, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/11/30/bdf5f94f01614791b6f7771b844aea92.jpg)
A snow cannon is seen at Holmenkollen Ski Jump in Holmenkollen National Ski Arena in Oslo, Norway November 28, 2018. (Photo/Agencies)
![Tourists takes pictures at Holmenkollen Ski Jump in Holmenkollen National Ski Arena in Oslo, Norway November 28, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/11/30/c5cc1ca43e56414b896eaa56f3a05764.jpg)
Tourists takes pictures at Holmenkollen Ski Jump in Holmenkollen National Ski Arena in Oslo, Norway November 28, 2018. (Photo/Agencies)