Foreign travellers walk along the trekking route near Namche Bazar, which is known as gateway to Mount Qomolangma, in Solukhumbu district, Nepal, Nov. 9, 2019. Autumn is the major season for trekking and mountaineering in Nepal. (Xinhua/Shristi Kafle)

Travellers walk along the trekking route near Namche Bazar, which is known as gateway to Mount Qomolangma, in Solukhumbu district, Nepal, Nov. 9, 2019. Autumn is the major season for trekking and mountaineering in Nepal. (Xinhua/Shristi Kafle)

Photo taken on Nov. 9, 2019 shows a foggy view of Namche Bazar, which is known as gateway to Mount Qomolangma, in Solukhumbu district, Nepal. Autumn is the major season for trekking and mountaineering in Nepal. (Xinhua/Shristi Kafle)

Foreign travellers walk along the trekking route near Namche Bazar, which is known as gateway to Mount Qomolangma, in Solukhumbu district, Nepal, Nov. 9, 2019. Autumn is the major season for trekking and mountaineering in Nepal. (Xinhua/Shristi Kafle)