阳梁昌禄 (or 化禄): This talks about 4 stars: 太阳，天梁，文昌，禄存.
This is about a special arrangement of 4 stars in the chart.
First scenario: Taking 命 sector as a reference point, if these 4 stars are found in sectors 3 sectors away, e.g. if 命 sector is in 寅, then the sectors 3 sectors away is 午 and 戌. Thus if these 4 stars are found in these sectors, and one of these sectors is the 命 sector, then this arrangement is fulfilled (these are known as 三方).