I don't know
As a Chinese saying goes, Pinyin is sh é Nb ù zh ī Gu ǐ B ù Ju é, which means that things are done secretly and are not discovered.
Idiom explanation
It's a secret thing to do without being noticed.
Idioms and allusions
1. Yuan · anonymous's "enemy creditor" the second discount: "this trouble God does not know, the ghost does not know, the heaven comes the highland to be thick." (2) the 42nd chapter of Water Margin by Shi Naian of Ming Dynasty, song Gongming meets nine heaven Xuannu and receives three volumes of Tianshu in Daocun village, and now there is no need to order many people to go. Song Jiang goes to the village secretly, and moves his father up the mountain with his brother song Qing. At that time, the gods and ghosts in the village are not aware of it. (3) Yao xueyin's "Li Zicheng" Vol.1 Chapter 14 Li Zicheng and Liu Zongmin led the team across Luonan and ambushed in the deep mountains and dense forests at the east foot of Huashan Mountain.
Discrimination of words
[pinyin code]: sbzj [usage] is used as adverbial and clause to describe a secret thing
Chinese PinYin : shén bù zhī guǐ bù jué
I don't know
spring is all over the human world. chūn mǎn rén jiān
Learning from the beginning and learning from the end. chì shǐ bì zhōng
pass on generation after generation. dài dài xiāng chuán