Nanjing Ming City Wall

There was no cement in ancient times, why was the Ming City Wall as stable as Mount Tai for 600 years? Materials that modern people often eat
Nanjing Ming City Wall cement glutinous rice
01-17
In ancient times, there was no "cement", why can the city wall stand for thousands of years without falling? See what the raw material is
Nanjing Ming City Wall Ming dynasty glutinous rice Great Wall nanking
01-11
There was no cement in ancient times, why was the Ming City Wall as stable as Mount Tai for 600 years? Materials are reluctant to use in modern times
Nanjing Ming City Wall He Ming glutinous rice Ming dynasty Zhu Yuanzhang UK_HISTORY
12-31