What kind of green dragon sand and white tiger sand? Do you have any special requirements for it?

Feng Shui master believes that the place of Longzhen Cave must be guarded by dragon and tiger sand, that is, there must be dragon and tiger sand to maintain the gate. It can be seen that the so-called Qinglong sand is the sand on the left side of Dongtian (Yangzhai), such as hills, bridges and other buildings; The so-called white tiger sand is the sand on the right side of the cave (the people standing in line in the direction of Yangzhai said the left and right sand). First of all, the dragon and tiger sand should be commensurate with the height, and it is beautiful and auspicious to bend the house and lock the left and right. All the dragon and tiger sands are opposite to each other, with sharp shooting and oblique flying, fine dew, broken waist and arm, and shortened coarse evil. Following the water, the mountain evil acts, and all swords, guns or evil stones shoot at the bridal chamber, which is unlucky dragon and tiger sand. Followed by the balance between dragon and tiger. Yangzhai is most afraid that tiger sand is higher than Qinglong sand. As the saying goes, a dragon's head is not as good as a white tiger's foot. White tiger sand in Yangzhai is higher than Qinglong sand. If you sit in the Nanyang mansion in the northern dynasties, the house on the right can't be higher than the house on the left, otherwise it will hurt the owner and people, and disaster will occur (Yin House is not taboo). The solution is to raise your villa to the same or slightly higher level, and to crack it with a gossip mirror and a stone block. Third, the white tiger sand in Yangzhai can't be longer than the blue dragon sand, which is also called the tiger bullying the dragon and giving birth to evil girls. In particular, avoid the white tiger sand hovering in front of the house, look back at the house and ask the white tiger to turn around, which means that the white tiger will turn around and bite the door with its mouth open, mainly hurting the owner, young adults and other people. The way to crack it is to destroy this land of tiger sand, put stinky cloves (that is, toilets) in this place, and crack it with the stone of gossip mirror.