天長地久

enduring while the world lasts (idiom) / eternal

day / sky / heaven

Tianchang, county-level city in Chuzhou 滁州[Chu2 zhou1], Anhui

length / long / forever / always / constantly

chief / head / elder / to grow / to develop / to increase / to enhance

-ly / structural particle: used before a verb or adjective, linking it to preceding modifying adverbial adjunct

earth / ground / field / place / land / CL:片[pian4]

(long) time / (long) duration of time

see 友誼地久天長|友谊地久天长[You3 yi4 di4 jiu3 tian1 chang2]