swear by the heaven and sun as witness
It is a Chinese idiom. The Pinyin is zh ǐ Ti ā NSH ì R ì, which means to swear to the sun by pointing to the sky. To show determination or loyalty to a person. It comes from the epitaph of Liu Zihou written by Han Yu of Tang Dynasty.
The origin of Idioms
Han Yu's epitaph of Liu Zihou in Tang Dynasty said, "I swear that life and death are not burdened by each other when I cry at the sky. It's true if I believe it."
Idiom usage
It can be used as a predicate or adverbial; it can be used as an oath or an example. Song Dynasty yuan Cai's "Yuan Shi Yuan · governing the family"
swear by the heaven and sun as witness
Gorgeous as peaches and plums, cold as ice - yàn ruò táo lǐ,lěng ruò bīng shuāng