Introduction to the mountain gate: The mountain gate in the shape of "mountain" with white characters stands among the green mountains and clear waters at the entrance of Tianqiaogou. The name of the garden was inscribed by the famous poet Mr. Zang Kejia, which makes it even more charming. Looking from a distance, on the mountain stream about ten feet wide between the two mountains, a huge stone lies horizontally, like a stone bridge in nature, hence the name Tianqiaogou.