Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Voice of Earth is Chinese singer alan debut Japanese-language album released by Avex Trax. The album contains the eight singles alan has released from 2007 to 2009. The album was released on March 4, 2009 in Japan. "Natsukashii Mirai: Longing Future" was used as the theme song for NHK special, Save the Future, for World Environment Day. Her sixth single "Red Cliff: Shin-Sen" was used to as the theme song for the movie Red Cliff. An alternate version of the song was used to promote the Japanese re-release of PlayStation 2 game Dynasty Warriors 6.[3] The song "Liberty", is being used as the theme song for Japanese drama, Hikon D mei ( lit. Non-Marriage Alliance?), which aired on Tokai TV.