旧友难维持新友难交心
[jiù yŏu nán wéi chí xīn yŏu nán jiāo xīn]
This nickname, '旧友难维持新友难交心' translates to 'It's hard to maintain relationships with old friends and even difficult to bond heart-to-heart with new friends'. It conveys sadness over difficulty keeping friendships due to distance or changes over time and expresses challenges building new deep connections.