暗码

àn mǎ diàn bào

暗码电报

cipher telegram

xiǎo tōu shì rú hé zhī dào yòng yǐ kāi bǎo xiǎn guì de àn mǎ

小偷是如何知道用以开保险柜的暗码？

How did the thieves learn the combination used to open the safe?

yǐ qián wǒ shuō guò zhè shì shù zì àn mǎ

以前我说过，这是数字暗码。

As I have said, it was a number code.