时光拐过竹马绕过地老天荒
[shí guāng guăi guò zhú mă răo guò dì lăo tiān huāng]
A poetic phrase suggesting that 'As time elapses, even if circumstances dramatically change over the years', the friendship/relationship between two people remains pure and eternal. 'Bamboo horse' here refers to toys boys rode astride in olden times, symbolizing childhood sweethearts.