1, body type: Tianjin oil gourd is generally larger than Beijing oil gourd.

2. Feeding environment: Tianjin is warmer in winter, which makes Tianjin oil gourd feel a little hot in sweater. In Beijing, however, housing units are small in scale, and more rely on bottom fire for heating.

3. Humidity: The humidity in Beijing and Tianjin is also slightly different, and Beijing is drier. If the humidity is not well controlled, more insects will come out.