Blac Chyna is celebrating her firstborn’s trip around the sun.

Indeed, the model penned a heartfelt tribute to her son King Cairo Stevenson —whom she shares with ex-fiancé Tyga —on his 13th birthday, offering a rare look into their sweetest memories together.

“From the moment you were born, you’ve worn your crown with curiosity, kindness, and courage,” Blac Chyna, 37, wrote on her Oct. 16 Instagram post , adding a photo of the two hugging. “Today, as you step into your thirteenth year, I want to share a few words of wisdom to honor the King you are becoming.”

The Chyna & Rob star (born Angela White ) encouraged King to “trust your heart, but listen to the good counsel of those who love you.” And as he continues to embrace his wisdom, she wants him to “lead

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