It's a long journey
It refers to the ups and downs of official life and the ups and downs.
In fact, it's not easy to understand
It's a long journey
I don't know if there is a Han Dynasty, what about the Wei and Jin Dynasties - bù zhī yǒu hàn,hé lùn wèi jìn
take advantage of an opportunity that comes one 's way - jiàn jī ér xíng
hate evil as one does one 's enemy - jí è rú chóu