璀璨小时光苍白小青春
[cuĭ càn xiăo shí guāng cāng bái xiăo qīng chūn]
It reflects a nostalgic sentiment towards precious but brief moments that shine brilliantly (璀璨小时光) contrasting with youth (苍白小青春) which may pass too quickly leaving only pale memories. The phrase contrasts fleeting joy and everlasting innocence lost.