心叫朋友钱交狗
[xīn jiào péng yŏu qián jiāo gŏu]
This nickname 'Xin Jiao Peng You Qian Jiao Gou' could literally mean 'heart tells friends money given dogs'. A better way might be interpreted as a play-on words indicating that one's kindness (or money/ resources) towards friends sometimes is betrayed like giving things directly to animals which will not give anything back. It expresses an attitude that true friendship should not involve calculation and interest and shows the disappointment toward utilitarian 'friendship' nowadays where many treat friends like objects for exchange, purely instrumental rather than emotionally close ties.