Huaisheng Mosque is the oldest mosque existing in China, It was first built by Sa'ad ibn Abi Waqqas during the Tang Dynasty (618-907), when Islam was introduced to China for the first time. Huaisheng means 'remembering the sage', in honor of Islamic holy prophet Muhammad. The mosque light tower is one of the earliest and most unique sites of Chinese Islamic architectures and is now in the tentative list of China World Cultural Heritage Sites