What does Kang Youwei's couplet, thousands of feet, mean that smallpox has been in the question bank for billions of years?

This couplet should be a tribute to the strange stone peak or stalactite flower of Huatianbao.

Meaning: From lamenting the beauty of nature-stalactites with thousands of feet or stone peaks with different shapes are like fairyland. Strange, it took billions of years to form a wonderful stone flower, and then admire the magic of creation.