Judging whether the news is bad or bullish mainly depends on the impact on listed companies. Most news is easy to judge.
Regular good news, such as: performance growth, shareholder increase, business development, winning the bid, optimization and restructuring, etc.
Conventional bad news, such as: pre-reduction and pre-loss, major shareholder reduction, litigation violations, etc.
There are still some news that need to be combined with market conditions, such as additional issuance. The bull market is positive and the bear market is negative.