Chinese border guards shot and killed Buddhist nun Kelsang
Namtso at the Nangpa La Pass between Tibet and Nepal on September 30, 2006.
The June 22 petition, sent to three central government offices and the Tibet Autonomous Region government, led to the cancellation of Beijing Sports University teacher Zhang Jian's plan to swim across
Namtso Lake, some 100 kilometers north of Lhasa, according to the Tibet Information Network.
Also in 2004, Tibetan and Chinese intellectuals successfully petitioned to stop Han Chinese sportsman Zhang Jian from swimming across Lake
Namtso in the TAR, a lake believed by many Tibetan Buddhists to be sacred.