Concave & Convex Mirror for protection against passive negative energy & against active harmful energy. Bagua mirrors are designed to be hung outdoors. To protect against and counteract bad luck caused by arrows of sha, Feng Shui practitioners invoke the eight trigrams or Bagua of the Early Heaven, an ancient Chinese arrangement of eight binary symbols comprised of solid or straight (yang) lines and broken (yin) lines that represents the unity of Heaven and Earth and the blessings that acrue from allignment with natural virtue. One concave Mirror for Inviting money and treasure wealth. Chinese Feng Shui Bagua mirrors are designed to be hung outdoors. The trigram for Heaven called Chien (three solid lines) goes at the top and the trigram for Earth called Kun (three broken lines) goes at the bottom. Fengshui mirror of Chinese traditional culture will bring good luck to your life and business. The gossip mirror is divided into three types: plane mirror, convex mirror and concave mirror. The different mirrors of the gossip mirrors are not the same. If you use the wrong method, it will be counterproductive.