These Illustrations were inspired by the Longmen Grottoes and the Thousand Buddha Grottoes.

The ladies are Feitian - a buddhist angel that been reincarnated from a good soul to it's current form,

Feitian serve the Buddha and Saints usually it is music or dance to entertain them in a particular heavenly paradise 

They are depicted in Tang dynasty fashions as it was considered the 'Golden age ' of Chinese history.