As wax begins melting onto the ground and bouquets of flowers pile up nearby, residents of China's Kunming city mourn.br br They're gathered in front of a train station where officials say knife-wielding attackers stabbed 29 people to death and injured more than 130 others.br br A migrant worker from a neighboring province explains the vigil.br br (SOUNDBITE)(Mandarin) MIGRANT WORKER WU BAO SAYING:br br "The 3.1 represents March the 1st for the compatriots who left us yesterday. It's hard to express. Of course I feel terrible, everyone feels terrible."br br Security maintained a heavy presence around the station on Sunday evening.br br The area by ticket offices where the attack took place remained closed off.br br A pile of unclaimed traveling bags still lies on the floor.br br Back at the vigil, the grief continues.br br (SOUNDBITE) (Mandarin) SECURITY GUARD RESIDENT CHEN BING SAYING:br br "I'm from Kunming.