for many years
Many years, a Chinese idiom, Pinyin is Du ō L ì Ni á NR ě n, which means a long time. It comes from the imperial edict of he Chen.
The origin of Idioms
In the Southern Dynasty, Emperor Wu of Liang Dynasty wrote, "I've never eaten the food of the country except for the public banquet. I've been a child for many years."
Idiom usage
It's a long time.
for many years
be good at giving systematic guidance - xún xún shàn yòu
the rainbow clouds like brocade spread - yú xiá sàn qǐ