挥挥手告别昨日的忧愁手牵手走完我们的以后
[huī huī shŏu gào bié zuó rì de yōu chóu shŏu qiān shŏu zŏu wán wŏ men de yĭ hòu]
Translated as 'Wave goodbye to yesterday's sorrows, hand in hand we will walk through the future together'. In this phrase, 'hand in hand' symbolically refers to partners holding each other firmly while moving forward despite past grievances. This suggests walking side-by-side throughout tough times ahead.