Qu%EF%BF%BD%EF%BF%BD%20t%EF%BF%BD%EF%BF%BD%EF%BF%BDng,%20%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%20l%EF%BF%BD%EF%BF%BDu%20ni%EF%BF%BD%EF%BF%BD%EF%BF%BDm tại Long Biên