literal meaning: mountains are tall, waters are long
translated: one's reputation travels far beyond them
山
shān
mountain
高
gāo
tall, high
水
shuǐ
water, river
长
cháng
long
毛不易 - 消愁
Mao Buyi - Xiao Chou
虽然从不相信所谓山高水长
Suīrán cóng bù xiāngxìn suǒwèi shāngāo-shuǐcháng
Although I never believed in a so-called "everlasting legacy"
In this song, the singer expresses doubt that people can have an influence which outlasts them, instead believing that once gone, people will quickly be forgotten.