"Hegui Building" has three strange: 1. Hegui Building is the tallest of all Fujian Tulous known, this is a strange. 2. It is said that the original site was selected to build the building, but did not find that this was a marshland at the beginning. The building was built on a layer. Suddenly the whole floor slowly sank to the rotten ground. The Jian family of the building was helpless, so they had to hit more than 100 cubic meters of piles on the wall of the sinking building. They felt that the foundation was firm. From the beginning, the wall was built, and a six-story square building was built. For more than two hundred years, the wind and rain were not moving. In the small patio of the building middle school hall with iron wire inserted into the ground, in one breath can be inserted more than 5 meters deep, pull out the iron wire, visible iron wire traces of silt, here, the patio will shake the whole boulder. 3. There are two wells in the building, 18 meters apart, the water level of the well is higher than the ground, the well on the left, clear like a mirror, the water quality is sweet, called "yangjing". The well on the right is turbid yellow, filthy, completely undrinkable, called "yinjing". This is a strange landscape due to the different material structure of the two wells. The shallow layer of the marsh is rotting marsh water, while the deep layer is drinking groundwater. The two wells are designed to hit the groundwater layer. However, the clear well is made of cement, and the turbid well is made of small round stones, which leads to less gap in the wall of the clear well, and the larger gap in the wall of the turbid well. While two wells pass through the marsh layer, a large amount of marsh water seeps into the turbid water, resulting in its turbidity and toxic, and the clear water wells do not seep into much so can be drunk.