八千里深海蔚蓝九千里高空湛蓝
[bā qiān lĭ shēn hăi yù lán jiŭ qiān lĭ gāo kōng zhàn lán]
Describing a very wide and magnificent scene: eight thousand miles of deep blue sea and nine thousand miles of dark blue sky. This conveys a feeling of awe for nature's beauty and grandeur beyond imagination.