黄河流域西部的地理情况.
A section of the Great Wall ends here by Yellow River's
shore at Jingtai, Gansu 甘肃 景泰 (top picture),
where the river emerges from its gorge section and
enters into the desert region. Jingtai is about 150 km
north of Lanzhou 兰州, which lies along the ancient Silk Road.
Between Lanzhou and the ancient capital Changan 长安 (now Xi'an)
is the city
Tianshui in Gansu 甘肃 天水, where we find this rock stem
protruding from the ground (bottom picture),
where religious and non-religious carvings are incised.
甘肃 景泰 长城 进入 黄河
Rock with carvings at Tianshui, Gansu
甘肃 天水 麦积山 石窟
图片资料: 黄河水利委员会 编:《黄河风》, 黄河水利出版社, 1996.