a million bold warriors

no echo - shí chén dà hǎi

tiny favour - yī fàn zhī dé

make investigations both within and without - nèi chá wài diào

spread rumors - gǔ shé yáo chún

immaterial - wú yǐng wú xíng

irrefutable proof of guilt - zhēn zāng shí fàn

change one's sorrow into joy - zhuǎn bēi wéi xǐ

months and years pass by - cháng nián lěi yuè

A close friend - wū jí zhī jiāo

burn the bridge after crossing it - guò qiáo chāi qiáo