The aerial photo taken on May 26, 2008 shows the landslide mud that formed the Tangjiashan quake lake near Beichuan County in southwest China's Sichuan Province. The earthquake-induced lake is at risk of bursting and threatening thousands of people downstream. (Xinhua/Zhu Wei)

    Chinese Premier Wen Jiabao went to oversee the safety of the Tangjiashan quake-formed lake by helicopter Thursday afternoon.

    "Now it's a critical moment for the Tangjiashan quake lake, and the most important thing is to ensure there is no casualty of the people," Wen said.

    He arrived in Mianyang of southwest China's quake-hit Sichuan Province Thursday afternoon and immediately boarded a helicopter to Tangjiashan.

    It's the third time for the premier to visit the earthquake areas since May 12.