A top Chinese sports official says athletes, coaches and team doctors must pass a written exam on banned substances ahead of the Olympics in Rio de Janeiro as part of the countrys zero-tolerance stance on doping.Vice director of the General Administration of Sports Gao Zhidian told the official Xinhua News Agency on Thursday that only those scoring 80 percent or more will be permitted to go to Rio.Olympics-bound athletes and coaches are also required to sign pledges not to cheat, with Gao saying violators would be severely punished.China has been firmly against doping and has a zero-tolerance approach to this particular problem, said Gao, who is also deputy chef de mission of Chinas 711-member Olympic delegation. We have made it very clear that we want to ensure fair play and the well-being of athletes.China has sought to shake off a reputation for doping, particularly in distance running and swimming, that gave rise to multiple scandals in the 1990s.That resolve was questioned when it emerged that officials waited six months before revealing that champion swimmer Sun Yang served a three-month suspension after testing positive in May 2014. Sun, the gold medalist in the 400- and 1,500-meter freestyle at the 2012 London Olympics, was named male swimmer of the meet at the world championships in Kazan, Russia, in August.China is sending 416 athletes to Rio, including 35 former Olympic champions. China topped the table at the 2008 Games and won the second-most medals in London, including 38 golds.Based on recent performances by Chinese athletes, some studies predict the country could return to the top of the table at Rio with as many as 39 golds.The Associated Press contributed to this report. 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"I think its a good thing. ALAMEDA, Calif. -- The Oakland Raiders released Pro Bowl fullback Marcel Reece on Monday after his four-game suspension for violating the leagues policy on performance-enhancing drugs was completed.Reece was suspended late last season and missed the final game of 2015 and the first three this season.With the Raiders running game thriving so far, the team decided it was time to cut ties with its longest-tenured position player.I dont know that the suspension played a big part in the decision, coach Jack Del Rio said.Other than to allow the guys that played, the backfield that we have, were using all those guys and theyre all doing a nice job in the roles that they have. We feel like its a good group and we dont want to disrupt it.Jamize Olawale has filled Reeces role as the fullback and is better suited as a lead blocker than the more versatile Reece.With the additions of rookies DeAndre Washington and Jalen Richard for depth behind starter Latavius Murray, there were few available opportunities for another back.Oakland (2-1) is averaging 148.3 yards rushing for the second-best mark in the NFL and a league-leading 5.9 yards per carry through three games.Despite that production, Del Rio said it was a difficult decision to let Reece go.We have a lot of admiration for the young man and a lot respect for what he brought to this organization for a number of years, Del Rio said. We feel like we have a really good group there so were making this decision.Reece was selected to his fourth Pro Bowl last season before the suspension came down.In eight seasons, he had 205 receptions for 2,015 yards with 12 touchdowns. He also ran for 844 yards on 183 carries with three touchdowns.What he has meant to the organization and to me over the past few years is hard to put into words, but his actions, both on and off the field, speak louder than any words can, general manager Reggie McKenzie said. Thiss was a tough decision.dddddddddddd Not enough can be said about Marcels commitment to his teammates and his pride in the Raiders, and we wish him and his family nothing but the best.The former college wide receiver who made himself into a successful NFL fullback often was a difficult matchup for opponents and was at times one of the few bright spots on some ineffective Oakland offenses.With his release, there are only three players on the Raiders roster who were brought into the organization by late owner Al Davis, who died in 2011.Kicker Sebastian Janikowski and long snapper Jon Condo pre-dated Reeces arrival in Oakland and special teams standout Taiwan Jones was part of Davis last draft class.Reece usually wore a T-shirt honoring Davis during pregame warmups.Owner Mark Davis, who took over the team after his fathers death, called this a sad day for the Raiders. He also said there will be a place in the organization for Reece after he retires.My father once said that I would have a tough time running this organization because I was too close to the players, and that rings true today, Mark Davis said. Marcel Reece has been a pillar of the organization for nine years and was the glue that held us together during a tough transition after my fathers passing. He helped put us on the upward path we are on today and his leadership will be sorely missed. The motto, `Once a Raider, Always a Raider, has never been more appropriate.Game notes The Raiders still have one open roster spot since they havent filled the 53rd spot created when DL Mario Edwards Jr. was placed on IR three weeks ago. ... Del Rio had no update on the status of RT Menelik Watson, who left Sundays game with a strained calf.---Online:AP NFL website: www.pro32.ap.org and www.twitter.com/AP-NFL Jerseys NFL Cheap Wholesale NFL Jerseys Wholesale Jerseys China Wholesale Jerseys Free Shipping Cheap NFL Jerseys China Jerseys Wholesale NFL Jerseys Cheap ' ' '