To ask for help
擿埴 sotu is an idiom pronounced "zh í Su ǒǒ t ú", which means that the blind use their sticks to explore the road. It's a metaphor for groping in the dark.
explain
Yi: knock on the ground; Suo: explore; Tu: road. A blind person who uses a stick to explore the road. It's a metaphor for groping in the dark.
source
Yang Xiong of the Han Dynasty wrote in FA Yan - self cultivation: "it's just a matter of doing things in the dark."
Examples
In recent times, the authors of magazines have been working together. They think that CI is beautiful. They listen to it noisily but have no end. If they don't get it, they repeat their Ci and get confused. Sun Yat Sen's words published in Min Bao
To ask for help
Save the time and improve the customs - jiù shí lì sú
settle one 's young wife in a golden house - jīn wū cáng jiāo