These two sentences represent the core wisdom of ancient business and investment, which is essentially about making decisions based on the principle of "things will develop in the opposite direction when they become extreme."

• When prices reach their peak, they will inevitably fall; when they hit rock bottom, they will inevitably rebound. The essence is to remind people to pay attention to "extremes" and anticipate trend reversals.

• Sell high-priced goods as if discarding dirt; buy low-priced goods as if acquiring jewels. This is the specific execution strategy for the principle mentioned above.