Why is the Jianlan orchid 'Shuangshe Qi' a rare floral art variety?

*Shuangshe Qi* is a large-flowered exotic orchid variety from Sichuan, with dark green leaves, an elegant leaf posture, and water-ripple patterns on the leaf surface. Its flowers can reach 9CM, very fragrant. The first flower basically has double lips, and those above sometimes also bloom with double lips, and sometimes with fewer lips and fewer petals. It is a very interesting exotic orchid!