一枝红杏出墙来爬上墙头摘红杏
[yī zhī hóng xìng chū qiáng lái pá shàng qiáng tóu zhāi hóng xìng]
A classical poetic expression derived from an ancient Chinese poem, literally saying 'a red apricot branches extends beyond the wall and climbs up on the wall trying to pick red apricots'. It vividly portrays something unexpectedly delightful emerging and extending over its usual boundary. In extended meaning, it usually depicts beauty and liveliness peeping out in spring or indicates human nature sometimes oversteps conventions or norms.