In 675, when Emperor Gaozong, because of his chronic illness (which might have been hypertension), considered making his powerful wife Empress Wu (later known as Wu Zetian) regent, the chancellor Hao Chujun vehemently opposed, and Li concurred with Hao, eventually leading to Emperor Gaozong abandoning the idea. In 676, Li was given the designation Tong Zhongshu Menxia Sanpin (*******), making him a chancellor de facto.
Hao
Emperor Gaozong