knock down
It's a Chinese idiom. Pinyin is p ā IB ǎ NCH é ngji ā o, which means that the merchant auctions the goods and claps the board to show the transaction. It also refers to the establishment of a transaction or the conclusion of an agreement.
Idiom usage
To come to an agreement
Examples
We can't go back on our bargain.
knock down
in one 's humble position , one 's word does not carry much weight - rén wēi yán jiàn
alternate tension with relaxation - yī zhāng yī chí
words are the voice of the mind - yán wéi xīn shēng