Though the styles and techniques of producing lacquerware were originally introduced to Ryukyu by China, native motifs gradually came to be incorporated into the islands' lacquerwares. Mother-of-pearl inlay is similarly not originally a Ryukyuan element, but it came to be used to depict papaya, plantain, palm trees, "tomoe", and other motifs of the sub-tropical islands. Other designs, such as images of hibiscus and coral, were introduced in the latter half of the 20th century as part of the artificial cultural production of tourism goods. Traditionally, the use of yellow, green, and other colored lacquers to create designs against the red background is another distinctive Ryukyuan method.