天然悠哉大無邪自然呆萌小天蒖
[tiān rán yōu zāi dà wú xié zì rán dāi méng xiăo tiān zhēn]
It refers to a lighthearted, carefree, innocent persona who appears naturally charming and cute. The first part emphasizes a simple but joyful nature while the second highlights cuteness that comes from a place of genuine authenticity. This implies being at peace without guile.