1. Determine the specifications and location of the flue in catering shops, and understand the direction and layout of the special flue in shopping malls.

2. According to the layout of the special flue in the mall, choose the appropriate access location and contact professionals for construction.

3. Prepare relevant materials and equipment, such as flue, connecting pipes and valves, and ensure the quality and safety of the equipment.

4. Carry out the construction according to the construction plan, and pay attention to protecting the facilities and environment of the shopping mall to avoid unnecessary damage.

5. Test and debug after the construction is completed to ensure the smooth and safe flue connection.