China's Du Li won the first gold medal of the Olympics with victory in the women's 10m air rifle final.
China's Li Du hit the mark
The 22-year-old's 502 points, which included an Olympic-record final round of 104, beat Russian Lioubov Galkina and Czech Katerina Kurkova.
Wang Yifu made it a Chinese double when he won gold in the men's 10m air pistol final with the final shot.
Russians Mikhail Nestruev and Vladimir Isakov took the silver and bronze medals respectively.
Nestruev scored 591 in qualification to beat the previous record of 590, which had been jointly set by Wang and Franck Dumoulin of France in Sydney 2000, but the 1992 Olympic champion raised his game to snatch victory in style.
Trailing the Russian with one shot left, Wang scored a 9.9 to pip his opponent by just 0.2 points in a nerve-shredding finale.
It was a dream result for Wang, who had been pipped for gold in
the last two Olympics.
Britain's Ian Peel and Ed Ling finished day one of trap qualifying in joint-19th and joint-22nd respectively.
Peel missed five of his 75 targets over three rounds to leave his chances of making the top six and going through to the final dependent on others making mistakes.
Britain's other trap contender Ed Ling hit one less target than Peel, giving him a total of 69 for the day and his medal chances are virtually ended.
Australia's defending Olympic gold medallist Michael Diamond also had a poor second round, only taking down 23 targets and finished the day in joint-ninth.
Ireland's Derek Burnett made the best possible start when he recorded the perfect score in the first round.
The Athlone-based competitor missed just one target in the second round but he failed with two attempts in the third and is currently joint-ninth alongside Diamond.
Meanwhile, world record holder Du said of her success: "It feels unbelievable. It's a very big honour."
China's shooting coach Xu Haifeng has predicted his team will win eight to 10 medals in Athens after taking three golds, two silvers and two bronze medals in Sydney.