It is not known when Sun Taizhen was born, but it is known that she came from the Wuyue capital Qiantang. The historical records did not state her heritage, but it is known that she had at least one younger brother, Sun Chengyou, who would later become a prominent general for Wuyue. She was said to be elegant, serious, intelligent, and wise. She was said to be proper and humble in her dealings with both her relatives by blood and by marriage. She was also said to be studious, being able to understand the Mao edition of the Classic of Poetry and the Lu edition of the Analects. It is not known when she married Qian Hongchu — whether it was before or after he became king in 948 — but she was said to be already "serving" him in her youth, suggesting that they were married early.
Queen Consort
Around new year 948, Qian Hongchu took the throne after his brother and predecessor, Qian Hongzong, was overthrown in a coup led by the general Hu Jinsi. Later in 948, Liu Chengyou, the emperor of Later Han, to which Wuyue was a vassal, created Qian Hongchu the King of Wuyue, and, presumably, at that time or shortly after, created Sun Taizhen a lady. She was said to be frugal and did not wear elaborate jewelry except at feasts. Later, during Later Han's successor stateLater Zhou, she was given the title of Lady Xiande of Wuyue. In 955, she gave birth to Qian Hongchu's first son, Qian Weijun. In 972, by which time Later Zhou had been succeeded by Song, Song's Emperor Taizu gave Lady Sun the greater title of Lady Xiande Shunmu of Wuyue. When Qian Hongchu, as a Song vassal, attacked Wuyue's northwestern neighbor Jiangnan's Chang Prefecture in 974, Lady Sun stayed at the capital Qiantang to oversee it. She frequently visited the generals who remained and the family members of the generals who followed Qian Chu on the campaign, to comfort them, and it was said that the people obeyed her as they did the king. Jiangnan fell in 975, and in 976, Qian Chu, whose Wuyue realm was now directly contiguous with Song proper, decided to go to the Song capital Kaifeng to pay homage to Emperor Taizu. Lady Sun and Qian Weijun went with him. Emperor Taizu gave Qian Chu great honors, and as part of honoring Qian Chu, created Lady Sun the queen of Wuyue. When they were departing Kaifeng, Qian Chu offered a tribute of gold coins to the Song emperor, and Queen Sun offered a tribute of gold vessels to Song's Empress Song. Queen Sun died in late 976.