It reminds me that between 1953 and 1945, before the Qinghai-Tibet Highway was built, the PLA acquired 28,000 camels from all over the country and organized a logistical transport team to carry out the transportation between Qinghai and Tibet. In three months, more than half of the camels died. At the end of the entire mission, less than 2,000 camels returned to the departure point, with a mortality rate of over 90 percent. After this it was said that there was no fear of getting lost to Lhasa because the camel bones became road signs. This is also the origin of the idea of building the Qinghai-Tibet Highway.