好姑娘光芒万丈好小子万丈光芒
[hăo gū niáng guāng máng wàn zhàng hăo xiăo zi wàn zhàng guāng máng]
Translating this nickname directly: 'Bright girl shining a million rays; good boy gleaming a million rays'. It refers to the bright prospects and personalities of both sexes – emphasizing positive, glowing attributes they possess.