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. Yesterday I came back from outside the city and I heard about this
