About
HSK levels

    1. to send by post; to mail
    2. to entrust; to place in sb's care; (bound form) to depend on; to attach oneself to; to reside temporarily
    3. (bound form) foster (as in 寄女[ji4 nu : 3] foster daughter)

    我想寄一封信给朋友。 Wǒ xiǎng jì yī fēng xìn gěi péngyou.