The saying that the geomantic omen in Donggang, Dalian is not good usually means that people generally think that the geomantic omen in this area is not good because of historical and environmental factors in this area. Specific performance in the following aspects:

1. Historical reasons: Dalian Donggang has experienced many natural disasters and wars in history, such as tsunami and war damage, which may lead to poor feng shui in this area.

2. Environmental factors: Dalian Donggang is located at the seaside with strong wind, and the breath of the ocean will also have an impact on the living environment. In addition, the architectural layout and design in this area may also be related to geomantic omen.

3. Cultural factors: China attaches great importance to geomantic omen, and the bad geomantic omen in Dalian Donggang may be caused by local cultural background and traditional beliefs.

It should be noted that these factors are not absolute, nor are they the only feng shui evaluation criteria of Dalian Donggang. Everyone's ideas and beliefs about Feng Shui may be different, so we can't generalize.