信号xìnhàoTop 2000Meanings1. signalCharacters used信letter号numberExamples2以前yǐqián人们rénmen用yòng烟yān作为zuòwéi联络liánluò信号xìnhào。Back then, people communicated using smoke signals.你nǐ说shuō什么shénme？我wǒ听不见tīngbujiàn，这里zhèlǐ信号xìnhào太tài差chà了le。What are you saying? I cannot hear, the signal here is too bad.