China said the death toll from last week's powerful earthquake jumped to more than 51,000, while the government appealed Thursday for millions of tents to shelter homeless survivors. The confirmed number of dead rose to 51,151 - a jump of almost 10,000 from the day before, Cabinet spokesman Guo Weimin told a news conference. Another 29,328 people remained missing and nearly 300,000 were hurt in the May 12 quake centered in Sichuan province, he said. The disaster destroyed or damaged millions of homes, including more than 80 percent of the buildings in some remote towns and villages near the epicenter. In bigger cities, whole apartment blocks collapsed or are now too dangerous to live in because of damage and worries about aftershocks. The government renewed an international appeal Thursday for help in housing some of the 5 million homeless survivors. "We need more than 3.3 million tents," Foreign Ministry spokesman Qin Gang told reporters, adding that 400,000 tents have already been delivered. "We hope and welcome international assistance in this regard. We hope the international community can give priority in providing tents," he said. Meanwhile, the Olympic torch relay resumed its run through China following a three-day national mourning period for quake victims. The relay, a symbol of the country's hopes for the Beijing Olympics, started with a minute of silence at a container terminal in the eastern seaport city of Ningbo. The torch run has been toned down from its previous boisterous celebration of the upcoming Olympics since the quake. "Your love is our hope," said the first torchbearer, crane operator Zhu Shijie. "We all must fight the earthquake together." Beijing Olympics organizers also said in a statement that the relay's Sichuan leg would be delayed "to support the disaster relief efforts." Originally planned for next month, the leg now will take place just before the start of the Aug. 8 games. Chinese leaders moved to contain the political fallout from the deadly earthquake, promising a 70 billion yuan ($10 billion) reconstruction fund, reining in the media and trying to keep despair from turning to anger in the disaster zone. State-run media, which conducted unusually probing reporting in the first days after the quake, have shifted to a more positive tone. Families in at least two towns where schools collapsed, killing their children, have protested or threatened to take local officials to court, suspecting shoddy construction. In Beichuan, the smell of bleach was overpowering as rescue workers in white safety suits sprayed disinfectant in the area. Villagers were picking up medicine from stands set up by the government. The town's government offices opened Thursday at a hotel in neighboring Anxian county. "Our previous office buildings collapsed, but our responsibilities, never," Ma Yun, head of the county's administrative office, was quoted as saying by the official Xinhua News Agency. Blocked streams, earthquake-loosened soil, mudslides and the upcoming rainy season create the risk of secondary disasters that can make relief work and rebuilding even more difficult, officials with the Ministry of Land and Resources said Thursday. Avoiding further geological disasters during relief work and rebuilding will be a "daunting task," said Yun Xiaosu, vice minister of land and resources. The earthquake and aftershocks created 34 lakes, known as barrier lakes, as debris blocked rivers and streams throughout the earthquake area. "The dangers at the barrier lakes are severe," Yun said. "The water level in some lakes is high and rising. If there's a break, it will cause severe damage." People who might be in the way of breaks already have been evacuated, he added. The region's rainy season starts in June, creating further problems and risk of major mudslides, Yun said.