箫以相惜笙以别离
[xiāo yĭ xiāng xī shēng yĭ bié lí]
These are allusions of classical Chinese instruments where '箫'(Xiao) is a bamboo flute and '笙'(Sheng) a reed instrument, symbolizing both empathy ('相惜') through music as well as the sorrowful farewell connotation.