呼籲 Simplified: 呼吁 On the HSK 7-9 vocabulary list, at CEFR level C2. hūyù ㄏㄨ ㄩˋ to call on (sb to do sth) to appeal (to) an appeal Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0 国际中文教育中文水平等级标准, 中华人民共和国教育部, MIT