His honorable title is:
The Most High Lord Lao, the Primordial Emperor of Supreme Virtue original: "Taishang Laojun Hunyuan Shangde Huangdi." This complex title blends Taoist divinity with imperial status, solidifying Laozi's role as the supreme progenitor of the Tang dynasty.

Honorable Title of the Holy Mother

In the ninth month of the third year of the Guangzhai era 684 CE. This was during the period when Empress Wu Zetian exercised power, eventually establishing her own Zhou dynasty., on the day of Jiayin, Empress Wu of the Tang posthumously honored
the Holy Mother Laozi's mother, traditionally known as Mother Li, who in Taoist lore is said to have conceived him after seeing a falling star or eating a magical plum. with the title:
Empress Dowager of the Primordial Beginning original: "Xiantian Taihou."
The Ancestral Hall is located at the Palace of Supreme Purity in Bozhou Located in modern-day Anhui Province, Bozhou is historically celebrated as the birthplace of Laozi and remains a major center for Taoist pilgrimage.; this is indeed the site.