About
HSK levels

    开关 開關

    kāiguān

    1. power switch; to switch on and off
    2. gas valve
    3. to open the city (or frontier) gate; to open and close

    请按一下这个开关来打开灯。 Qǐng àn yīxià zhège kāiguān lái dǎkāi dēng.