The east extension line of Fuzhou Metro Line 2 starts from the section behind Gushan Station of Line 2 and ends at Qingzhou Station. The total length between Rujiang Station and Xiade Station is about 1.23 kilometers.
The strata in the interval are mainly water-rich strata such as silt mixed with sand and fine to medium sand (containing mud) The risk level is high and the construction is difficult. Water inrush may occur especially in water- rich sand layers. Outstanding problems such as sand gushing and gushing.