S21 Guangzhou–Huidong Expressway

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Guangdong Expwy S21 sign with name.svg

S21 Guanghui Expressway (simplified Chinese: 广惠高速公路; traditional Chinese: 廣惠高速公路; pinyin: Guǎnghuì Gāosùgōnglù) is a route that connects the cities of Guangzhou and Huizhou in the Chinese province of Guangdong.