天长地久有绝时此恨绵绵无绝期
[tiān zhăng dì jiŭ yŏu jué shí cĭ hèn mián mián wú jué qī]
The name comes from a classic Chinese expression that means 'there may be an end to eternal love but not the lingering sorrow,' expressing deep and enduring heartache even when long-lasting feelings have faded away.