The picture shows tourists playing at the observation deck of Mount Everest Base Camp. 中新社记者 贡嘎莱松 摄 图为游客在珠峰大本营观景台骑自行车。 Photo by China News Service reporter Gonggalaisong The picture shows tourists playing at the observation deck of Mount Everest Base Camp. Photo by China News Service reporter Gongga Laisong The picture shows tourists taking photos at the observation deck of Mount Everest Base Camp. 中新社记者 贡嘎·莱松 摄 6月17日，西藏日喀则市定日县珠穆朗玛峰风景区天空晴朗，景色壮丽。 中新社记者 贡嘎·莱松 摄 6月17日，西藏日喀则市定日县珠穆朗玛峰风景区天空晴朗，景色壮丽。 Photo by China News Service reporter Gonggalaisong The picture shows tourists playing at the observation deck of Mount Everest Base Camp. 中新社记者 贡嘎莱松 摄 图为外国游客在珠峰大本营观景台玩耍。 Photo by China News Service reporter Gongga Laisong