Faraway Friends - Imaginary Friends

Ying, a girl who loves colors, has a unique friendship with Cho, a black and white furry friend. Despite their differences in personality and preferences, such as Ying's love for swinging and Cho's shyness, they share a bond. Cho enjoys eating bamboo, while Ying is a fussy eater. They both enjoy eating fruits together. As they sit in the garden, Ying spots shapes in the sky, but Cho feels sad about the rarity of pandas like him. Ying comforts Cho, cherishing their friendship.

What fruit do Ying and Cho enjoy eating together?

Why is Cho sad when looking at the sky?