To ask for help
The synonym "suothu" generally refers to "suothu". Suothu is an idiom, and its pronunciation is "zh í zh í Su ǒ 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
A long way to go
find no fault in examining one 's heart - nèi xǐng bù jiù
a learning both sound in theory and practice - nèi shèng wài zhǔ
introspect on one 's own accord and listen to other 's views - nèi shì fǎn tīng
steal what is entrusted to one 's care - jiān shǒu zì dào