It's a common dilemma. You've run out of mortar and can't face eating your rice porridge for lunch. What to do? Use the porridge as mortar, of course. Obviously this isn't a shock to anyone who has ever eaten sticky rice. What's more of a worry is these walls were built as long ago as the Sui and Tang dynasties, from 581 to 907 AD. Speculation says rice porridge was even used by workers in building the Great Wall. That stuff sits in your stomach, people.

Another first for China: the first food visible from space*.

* _{Yes, I know.}