The _pa-kua_ (eight trigrams) and the _Yin-yang_ symbol of the duality of Nature have been described. The eight musical instruments are: (1) _Ch’ing_, the sounding stone, a sort of gong usually in form of a mason’s square. It forms a rebus for _ch’ing_ (good luck). (2) _Chung_, the bell. (3) _Ch’in_, the lute. (4) _Ti_, the flute. (5) _Chu_, the box, with a metal hammer inside. (6) _Ku_, the drum. (7) _Shêng_, the reed organ. (8) _Hsüan_, the ocarina, a cone with six holes. The twelve _chang_ or ancient embroidery ornaments are: (1) _Jih_, the Sun, a disc in which is a three-legged bird, and sometimes, the character _jih_ [chch]. (2) _Yüeh_, the moon; a disc with hare, toad and cassia tree, and sometimes the character _yüeh_ [chch]. (3) _Hsing ch’ên_, the stars: represented by three stars connected by straight lines. (4) _Shan_, mountains. (5) _Lung_, dragons. (6) _Hua ch’ung_, the “flowery creature,” the pheasant. (7) _Tsung yi_, the temple vessels: one with a tiger design and the other with a monkey. (8) _Tsao_, aquatic grass. (9) _Huo_, fire. (10) _Fên mi_, grains of rice. (11) _Fu_, an axe. (12) _Fu_, a symbol of distinction[516] (see vol. i., p. 227). The Eight Happy Omens (_pa chi hsiang_) were among the signs on the sole of Buddha’s foot. They are usually drawn with flowing fillets attached (Fig. 2), and they are as follows: (1) _Lun_, the wheel or chakra, sometimes replaced by the bell (_chung_). (2) _Lo_, the shell. (3) _San_, the State umbrella. (4) _Kai_, the canopy. (5) _Hua_, the (lotus) flower. (6) _P’ing_, the vase. (7) _Yü_, the fish; a pair of them.[517] (8) _Ch’ang_, the angular knot representing the entrails; an emblem of longevity.[518] [Illustration: Fig. 2.--The Pa chi hsiang] The Seven Gems (_ch’i pao_) are: (1) _Chin lun_, the golden wheel. (2) _Yü nü_, the jade-like girl. (3) _Ma_, the horse. (4) _Hsiang_, the elephant. (5) _Chu ts’ang shên_, divine guardian of the treasury. (6) _Chu ping ch’ên_, general in command of the army. (7) _Ju i chu_ the jewels which fulfil every wish; a bundle of jewelled wands bound round with a cord. The _Pa an hsien_, Attributes of the Eight Immortals, as detailed above (p. 287), are: (1) _Shan_, the fan of Chung-li Ch’üan. (2) _Chien_, the sword of Lü Tung-pin. (3) _Hu lu_, the gourd of Li T’ieh-kuai. (4) _Pan_, the castanets of Ts’ao Kuo-chiu. (5) _Hua lan_, the basket of flowers of Lan Ts’ai-ho. (6) _Yu ku_, the bamboo tube and rods of Chang Kuo Lao. (7) _Ti_, the flute of Han Hsiang Tzŭ. (8) _Lien hua_, the lotus flower of Ho Hsien Ku.