相似的人适合玩闹互补的人才能终老
[xiāng sì de rén shì hé wán nào hù bŭ de rén cái néng zhōng lăo]
Translates to 'Similar people are suited for play; complementary ones can grow old together.' It reflects the idea that while similarity can bring fun and companionship, true harmony and long-lasting relationships require complementarity.