Nanjing subway is being updated and adjusted without guardrails. According to relevant public information, China Railway 24th Bureau of Fujian Road Station of Nanjing Metro Line 7 received a report from the public that the road and bridge lane separation guardrail was damaged and displaced, which affected travel safety. The construction party of Nanjing Metro said that in view of the problems existing in the enclosure during the subway construction, the subway staff will take corresponding measures according to the type, material, size and damage degree of the enclosure, reinforce the enclosure, eliminate potential safety hazards in time and ensure the safety of residents' travel.