Jiùsuàn tiānyá-hǎijiǎo, wǒmen de yǒuyì bù huì gǎibiàn.
Even if we're worlds apart, our friendship won't change.
Tips
culture
天涯海角 is also the name of a famous tourist site on the southern coast of Hainan Island, featuring large rocks inscribed with the characters 天涯 and 海角. It's a popular destination for couples.