A woman feeds a lamb during the nomadic migration on the Ar Horqin grassland in Chifeng City, north China's Inner Mongolia Autonomous Region, June 1, 2019. Yearly nomadic grazing is still a tradition for people live on the Ar Horqin grassland, where was listed of National Important Agricultural Heritage Systems in 2014. For a long time, herdsmen would decide the route and time of yearly nomadic grazing according to the growth of grassland. (Photo: Xinhua)

Herdsmen sacrifice at an obo (stone pile for offering sacrifices to the gods) to pray for good weather during the nomadic migration on the Ar Horqin grassland in Chifeng City, north China's Inner Mongolia Autonomous Region, June 1, 2019. Yearly nomadic grazing is still a tradition for people live on the Ar Horqin grassland, where was listed of National Important Agricultural Heritage Systems in 2014. For a long time, herdsmen would decide the route and time of yearly nomadic grazing according to the growth of grassland. (Photo: Xinhua)

Herdsmen herd livestock during the nomadic migration on the Ar Horqin grassland in Chifeng City, north China's Inner Mongolia Autonomous Region, May 31, 2019. Yearly nomadic grazing is still a tradition for people live on the Ar Horqin grassland, where was listed of National Important Agricultural Heritage Systems in 2014. For a long time, herdsmen would decide the route and time of yearly nomadic grazing according to the growth of grassland. (Photo: Xinhua)

A herdsman herds livestock during the nomadic migration on the Ar Horqin grassland in Chifeng City, north China's Inner Mongolia Autonomous Region, May 31, 2019. Yearly nomadic grazing is still a tradition for people live on the Ar Horqin grassland, where was listed of National Important Agricultural Heritage Systems in 2014. For a long time, herdsmen would decide the route and time of yearly nomadic grazing according to the growth of grassland. (Photo: Xinhua)

A woman caresses a lamb after arriving the summer camp during the nomadic migration on the Ar Horqin grassland in Chifeng City, north China's Inner Mongolia Autonomous Region, June 1, 2019. Yearly nomadic grazing is still a tradition for people live on the Ar Horqin grassland, where was listed of National Important Agricultural Heritage Systems in 2014. For a long time, herdsmen would decide the route and time of yearly nomadic grazing according to the growth of grassland. (Photo: Xinhua)

The livestock rest during the nomadic migration on the Ar Horqin grassland in Chifeng City, north China's Inner Mongolia Autonomous Region, June 1, 2019. Yearly nomadic grazing is still a tradition for people live on the Ar Horqin grassland, where was listed of National Important Agricultural Heritage Systems in 2014. For a long time, herdsmen would decide the route and time of yearly nomadic grazing according to the growth of grassland. (Photo: Xinhua)

A family unload daily necessities from a truck during the nomadic migration on the Ar Horqin grassland in Chifeng City, north China's Inner Mongolia Autonomous Region, June 1, 2019. Yearly nomadic grazing is still a tradition for people live on the Ar Horqin grassland, where was listed of National Important Agricultural Heritage Systems in 2014. For a long time, herdsmen would decide the route and time of yearly nomadic grazing according to the growth of grassland. (Photo: Xinhua)