sentences:  Only three to four living specimens are known; one to two at Dong Mo Lake Son Tay in Hanoi, Vietnam, (taxonomy of the second individual is not yet certain), one at Xuan Khanh Lake near Hanoi, Vietnam, and one in Suzhou zoo in China.A specimen at the Beijing Zoo died in 2005, and another one at the Shanghai Zoo died in 2006; both of them were caught at Gejiu in the 1970s.In 1999, 2000, and 2005, turtles re-emerged from Hoan Kiem Lake in Hanoi and were seen by a large audience and caught on film.