The origin of the idiom: Kang Youwei once wrote in the book of Great Harmony: "The manhole of the past, think deeply, cover up the knowledge, so trace back to its source, establish the meaning of prenatal education, and teach it before it is formed."

Tracing back to the source: Shi Sanyou's Jinling unofficial history Yuanmingyuan and Ji Tai Engineering Department: "When it comes to these eight items, I can't help but mention the Beiyang government chief Zhu Qiqian."

Extreme poverty means thoroughly studying the source.

Poverty is the root of poverty: seeking an end. Explore the origin of things.

Exploring the root of poverty: seeking; Ben: tree roots; Poverty: exploration; Source: water source. Find a root to find water. Metaphor explores and traces the root of things.

Trace to the source, explore the root cause and find the reason.

Tracing to the source is a metaphor for exploring and tracing the roots and sources of things. The same as "exploring the root of poverty".

Chasing the source: chasing; Ben: fundamental; Seek: explore. Investigate the root cause of the incident.

Looking for the root of poverty: looking for the end. Investigate the root cause of the incident.