In mid-December 2019, construction works near the Siming District were affected by subsidence. A major water pipe burst, and dirty water flooded the construction site, affecting the concourse, platform and metro lines under construction. The subsidence also caused a collapse of the surface road and a resulting crater of approximately 500 square metres (5,400 sq ft). The cause is believed to be a burst water pipe. Water also penetrated the now-opened Lücuo station of Line 1, and flooded the concourse and platform.[4]