听说你会发光那你发一个听说你是超人那你飞一个
[tīng shuō nĭ huì fā guāng nèi nĭ fā yī gè tīng shuō nĭ shì chāo rén nèi nĭ fēi yī gè]
Translating directly, it means 'If I've heard you can glow then do so; if I've heard you're a superhero then fly'. This is often used humorously as a playful challenge to prove one's capabilities when rumors suggest impressive feats.