一枝红杏出墙来坐在墙头等红杏
[yī zhī hóng xìng chū qiáng lái zuò zài qiáng tóu dĕng hóng xìng]
Originates from classical Chinese poetry referring to 'peach blossoms (here 'red apricot') peeking over a wall.' Here extended with 'waiting' on top, symbolizing waiting for love or someone special while standing out or trying not to hide oneself from being noticed.