"Langya Sea" is a song written and sung by Sister Apple, adapted from a folk song. This song was released on February 20, 20 18 18, with a duration of 3 minutes and 38 seconds. Sister Apple, a singer in China, has attracted much attention for her unique voice and talent. Her singing style is unique, full of energy and passion, which is deeply loved by young audiences. The song "Waves in Qinghai" shows Sister Apple's musical talent and innovation in traditional music, and becomes one of her representative works.