3 qualitative

• The moat company. It is not a powerful technology, monopoly products, but network utility (the more people use it, the better), high user conversion costs, cost management advantages (relative to rival companies, scale, management), brand utility
• The product is sustainable in the long term and the business cannot change frequently. consumer
• Must have top management. Earnings, shareholder friendly (repurchases), management candid, management following suit

Do not pursue rapid growth, future potential; pursue past and present, the company itself.

3 quantitative

• ROE Return on Equity. The average ROE in the past 10 years was higher than 20%, and there was no ROE lower than 15% in the past 10 years.
• profitability. Long-term gross profit margin 40%+
• Debt ratio (long-term debt/total assets). Moderate debt levels, generally below 40%.

refer to

Buffett's 6 principles of stock picking