This is the only one, and it is also the only one in the true sense. In other words, Wu Zetian was really ruling the country when she was queen, not listening to politics behind the scenes, nor was she ousted at the end of the day. In any sense, Wu Zetian is no different from other male emperors.
To be exact, there have been four queens in the history of China, namely Yuan Girl of Shang Emperor in Northern Wei Dynasty, Chen Shuozhen, Wu Zetian, the female leader of peasant uprising, and Emperor Chengtian of Western Liao Dynasty. However, in ancient China, Lv Zhi, Xiao Chuo and Cixi were mostly quasi-emperors, not real emperors.
Then why didn't the Yuan girl of the Shang Emperor in the Northern Wei Dynasty, the female leader of the peasant uprising, Chen Shuozhen, and the Emperor Chengtian of the Western Liao Dynasty be recognized as female emperors in the history of China? The fundamental reason is that they didn't really rule the country and were driven down when they acceded to the throne, so they can't be called emperors.
Shang Emperor of Northern Wei Dynasty: Known as "Yuan Girl" in history, she was the only daughter of Xiaoming Emperor Xu Yuan and Pan Waili, Chonghua and Xiaoming Emperor of Northern Wei Dynasty. It was supposed to be a princess, but after the death of Emperor Xiaoming, the situation was dangerous and the country could not live without a king for a day. So, her grandmother, Hu Taihou, who held the actual power of the empire, declared herself a male (that is, a prince), granted amnesty to the whole world, and copied the title of Emperor Xiaoming, Wu Tai. Soon, Emperor Xiaoming suddenly collapsed, and he became the only son of the first emperor in Yuanshi County, the "Prince" in infancy, and became the emperor of the Northern Wei Dynasty in name. Yuanshi county was deposed on the day of his accession to the throne, and he did not actually ascend to the throne. Later, it was not recorded in the history books.
Chen Shuozhen, Emperor Wenjia: The leader of the peasant uprising in Qingxi County, Shimufu, Tang Gaozong (now Chun 'an County, Zhejiang Province), was originally a witch who claimed to have returned from heaven to earth and turned into a person who used evil words to confuse people. At the beginning of 653 10, she began to call herself "Emperor Wenjia", but the uprising soon failed and she herself was killed in that year 1 1 month. Chen Shuozhen's title of emperor is only the title of self-styled or his own revolutionary army, but he did not ascend to the throne, establish a name or establish a country. Most later generations don't recognize her as a female emperor: because the uprising she led was only the rebellion of the country's wealth and people's security in the Gaozong era.
Emperor Chengtian of the Western Liao Dynasty: the daughter of Lu Ye Yilie, son of Emperor Renzong of the Western Liao Dynasty, and the sister of Lu Ye Yilie, son of Prince Renzong of the Western Liao Dynasty. Because Luye Zhigu is young, she is the fourth emperor of the Western Liao Dynasty. However, in order to emulate Xiao Chuo, the mother of Emperor Shengzong of Liao Dynasty, she claimed to be the Empress Chengtian, who could govern in Liao Dynasty and sign for the Empress Dowager. This is theirs.