An imperially inscribed pale celadon jade table screen, Qing dynasty, Qianlong period | 清乾隆 青白玉雕攜琴訪友圖插屏

The poem may be translated as:

Visiting friends with zither

Sometimes boisterous, sometimes serene,

the melody of mountain and river teems with nuance.

In the meeting of friends, recounting days long past, 

the tune resides amidst the whispering pine wind.