改签 Traditional form: 改簽 Pinyin (reading): gǎiqiān Definitions: to change one's reservation to transfer to a different flight, airline, bus or train Characters: 改 - to alter, to change, to improve, to remodel 签 - to sign, to endorse; a note, a slip of paper Traditional characters: 改 - to alter, to change, to improve, to remodel 簽 - to sign, to endorse; a note, a slip of paper