羯鼓：两面蒙皮，腰部较细的一种鼓。敲击羯鼓，使杏花早开。
drumming to make apricots flower, cf joke by Tang Emperor Xuanzhong 唐玄宗, playing the drum in apricot blossom
羯(jié)
鼓(gǔ)
催(cuī)
花(huā)
