1.Define start, end, gas receiving and distribution points per project requirements.

2.Determine route alignment based on terrain, geology and environment:

a. Adopt straight alignment while meeting station and crossing demands;

b. Avoid poor geological zones;

c. Keep away from military sites, hazardous warehouses, stations, docks, dense residential areas and nature reserves;

d. Consider traffic, residential areas and urban planning for easy construction and operation.

3.Comply with relevant codes.