The problems we see are merely the tip of the iceberg.
Tips
memory
Literal breakdown matches the English idiom one-to-one: 冰山 (iceberg) + 一角 (one corner). About 90% of an iceberg sits underwater — what's visible is just one corner.
usage
This is a calque from English 'tip of the iceberg' that has fully naturalized in modern Chinese, especially in journalism and business reports. Native speakers don't perceive it as a foreign idiom.
