精诚所至金石为开

精诚所至，金石为开　　jing１ cheng２ suo３ zhi４　jin１shi２wei４kai１

精 spirit: clear distilate of material object, whether literal or metaphoric. JING1

诚 honest 精诚=sincerity The spoken word of the city, achieved. CHENG2

所 thus work tools set before one's door as a symbol of that which follows SUO3

至 reach originally an arrow which hit the ground; simplified and standardized ZHI4

金 gold

石 stone　金石=metal and stone; i.e. hard durable things.

为 because, cause; powerful plow breaking up the earth as a symbol.

开 open: the lock of a gate or large door.

Absolute sincerity splits open even metal and stone i.e. where there is a will there is a way.
(=truth will break the hard hearted)

城市