Which is the earliest Taoist temple in China?

Heming, Dayi, Chengdu is the place where Zhang Tianshi founded Taoism and the birthplace of Taoism. Now it belongs to Quanzhen Road. Lu Yi Taiqing Palace is located in Laozi's hometown. In the Tang Dynasty, it was regarded as a royal ancestral temple. Now it belongs to Quanzhen Road. Zhong Nanshan Louguantai is the place where Laozi preached to Yin. According to legend, it was built in the Zhou Dynasty. Stone Tianfu in Longhu Mountain is the residence of Zhang Tianshi and the headquarters of Zhenghe Road. Qingcheng Mountain Taoist Temple, also known as "Shi Tian Cave", is the place where Zhang Daoling practices monasteries. Now it belongs to Quanzhen Road. Beijing Baiyun Temple, where Qiu Chuji lived and buried for a long time, is the headquarters of Quanzhen Road and one of the three ancestral halls. Now it is the seat of the Chinese Taoist Association. Located in the northwest corner of the Forbidden City in Beijing, the Grand Hall of the Xuan in Beijing is a royal Taoist temple in the Ming and Qing Dynasties. Taishan Daimiao is located in Tai 'an City, Shandong Province. Now it belongs to Quanzhen Road. The Zhongyue Temple in Songshan Mountain was revered by the Emperor of the Northern Song Dynasty because it was close to Kaifeng, the capital of the Song Dynasty. Tianjin Tianhou Palace, one of the three Mazu ancestral temples. Now it belongs to Quanzhen Road. Ruicheng Yongle Palace is famous for its exquisite murals. Jiezhou Guandi Temple, located in Yuncheng, the hometown of Guan Yu, is the ancestral temple of Guandi Temple in the world. Shenyang Taiqing Palace now belongs to Quanzhen Road. Suzhou Xuanmiao Temple and Sanqing Hall in the temple are rare ancient buildings in the Song Dynasty. Changchun Palace, named "Changchun", is dedicated to Qiu Chuji. Taihe Palace in Wudang Mountain is the main body of the world heritage Wudang Mountain ancient building complex. Qingyang Palace in Chengdu is said to be the birthplace of Laozi. The present temple was built in the Qing Dynasty and belongs to Quanzhen Taoism. Kunming Taihe Palace is famous for its bronze "Golden Hall". The existing buildings are mainly built by Wu Sangui. Xi 'an's Eight Immortals Palace is said to be the place where Lv Dongbin cultivated immortality and enlightened Taoism. Empress Dowager Cixi and Emperor Guangxu lived here when they took refuge. Now it belongs to Quanzhen Road.