Five-Flowed Mountain (Wutaishan) is a famous Buddhist mountain in China. The Zhenru Temple (静音寺, Jingyan Si) I assume you are referring to is one of the many temples within the Wutaishan complex.
According to my information, there is no direct phone number for Zhenru Temple or any other specific temple on Five-Flowed Mountain because most Chinese Buddhist temples and monasteries tend not to have publicly accessible phones numbers. They usually communicate through messages or letters between monks and visitors who are staying at the temple.