Tai Tai is the partner, and the childhood soulmate of The First Disciple Tai Taeyang. 

“Uwahhhhh uwaahh” sound of a baby crying. 

Clouds, dark about to rain, the atmosphere, chill and windy. 

“Uwahhh uwahhh” the cry got even more desperate. 

“Who’s crying?” A person in golden clothes. The person looks around in search of the baby. Their eyes met with a baby lying on a piece of dusty cloth, throwing its hands and legs up in the sky, with fists closed, eyes red from crying, tears rolling down its pink round cheeks. 

Seeing the baby, the person rushed to the baby, “a baby! who’s baby is it ?” “Who can do such a cruel thing to a baby?” They look around for its parents, but no human being can be seen. 

“There’s no one what should I do?” They took the baby in their arms with great care. The baby seemed to stop crying, feeling the warmth of the person’s body. 

“The baby is in front of The Yami city gate, what if its a trap? But the baby looks healthy and has golden clothes on like me” they proceeds to look at their own cloth as and goes closer to the baby to examine the clothes on it, “it’s a boy.” 

The person thinks nothing more and heads towards the direction of Taiyang city. 

“Second Master. Second Master” they yelled, panting for walking fast as it’s about to downpour.  Walks towards the library where Tai Ruo stays half of his day. 

Tai Ruo, “what happened?” Lifting up his head. 

“Second Master I found an abandoned baby with golden clothes on, from in front of the Yami city gate.” 

“Tai Cheng, you should calm down first” Tai Ruo says, holding the baby from the person’s hand. 

From the name of the person, it can be clearly said that the person is a part of The Suns. 

Tai Ruo looks down at the baby, “a baby in Sun clothes” his face as gentle as ever. 

The Sun pendant on the baby’s neck is shining even in this dull weather. Sun patterns on his clothes matches with the one the baby is wearing. 

A Sun pendant for the males of The Suns and a Sun bracelet for the females are the part of the clothing and accessories compulsory to wear. The Sun pendant on the baby has the same designs and textures as on the bracelet, Tai Cheng was wearing on her right hand. 

Tai Ruo examined the pendant and said, “Tai Cheng, this baby is of The Suns. You found him, so you have to take all his responsibilities.” 

Tai Cheng nods her head, stretching both her hands to take the baby to herself again. 

The baby is named Tai Tai.  Later, when the baby grew older, he was given to Tai Ruo as his disciple. The only son of Tai Ruo and Tai Tai studied together, trained together. Tai Tai became good friend with Tai Taeyang and his other classmates. Tai Taeyang and others adores him, as he is the youngest of all.