Not Your Run-of-the-mill Crouching Tiger & Hidden Dragon
All and everything is a Taiji, or Tai Chi, in itself. Tai Chi is the unity of Yin and Yang. One can think of Tai Chi the same as Yoga. All and everything exists for a reason and has a purpose. The dual property of Tai Chi in its various aspects is the rhythm of nature. Such rhythm is known through the interaction and interdependence of the Bagua, or Eight Trigrams.
In the eastern trigram, prenatal fire is postnatal thunderbolt. Thunderbolt belongs in the wood element. Thunderbolt-struck wood is charged with prenatal fire. We call such wood the Hidden Dragon.
In the western trigram, prenatal water is postnatal lake. Lake belongs in the metal element. Meteorite metal is composed of prenatal water. We call such metal the Crouching Tiger.
Earthly things are made of wood or metal. Therefore, Chinese call things dong-xi, or east-west.
Thunderbolt-struck wood and meteorite metal are relatively speaking rare things. Such postnatal things are now infused with prenatal charges. Such things are a prime choice material for dharma instruments. Such things are empowered by the rhythm of nature as a protective talisman.
I have acquired a few pieces of the thunderbolt-struck wood. They are been carved into Buddha and Bodhisattva pendants.
I still have a few pieces, and they are reserved for my students in the class - Convergence of Radiance.