对林萧而言简溪是青春
[duì lín xiāo ér yán jiăn xī shì qīng chūn]
Translated to 'for Lin Xiao, Jian Xi is youth'. This could reference characters from Guoman’s novel where Lin Xiao's time spent with her lover Jian Xi represented some of the best moments, which also constituted her youthful years. So choosing this pseudonym can suggest feelings of nostalgia or romanticism towards a pure, young love.