The snakes are a way of sharing an aesthetic sensibility. In cities and towns in the lowlands you don't see anything like this. All you see on big walls in the city are billboard advertisements.
而在許多平地城鎮，像這樣「自己看不到，而別人最看得到」的大牆面，幾乎都留給了廣告，「賣」了錢。