每日普通話 Daily Mandarin Chinese – The Oasis of the Sea: Qingdao. – www.e-Putonghua.com

Learn Putonghua – The Oasis of the Sea: Qingdao. – www.e-Putonghua.com

海上有绿洲：青岛。 (Hǎishàng yǒu lǜzhōu: Qīngdǎo)