伸手不及松手成空
[shēn shŏu bù jí sōng shŏu chéng kōng]
Translates to 'Outstretched hands fall short; letting go makes everything void.' This phrase describes a sense of helplessness and loss, possibly conveying the feeling that one can’t grasp what they desire or that once something is given up, it vanishes into emptiness.