Wang and Yu and the team of Jung Kyun-eun and Kim Ha-na dumped serves into the net and made simple errors. The longest rally was only four strokes. The umpire warned the women midway through the first game, tournament referee Torsten Berg then spoke to all four players but it had little effect.
Eventually, the Chinese women lost 21-14, 21-11 and both pairs were jeered off the court.
The teams had already qualified for the last 16, but the result ensured that the top-seeded Wang and Yu will avoid playing their No. 2-seeded teammates until the final.
The problem was repeated in the next women's doubles between South Korea's Ha Jung-eun and Kim Min-jung and Indonesia's Meiliana Jauhari and Greysia Polii. Both teams were also warned for deliberately losing points in a match the Koreans won 18-21, 21-14, 21-12. The capacity crowd vented their displeasure on them, too.
Berg and the Badminton World Federation said they were going to investigate.
Yu said they were only trying to save energy for the knockout rounds starting on Wednesday.
"We would try hard in every match if they were elimination games," she said. "Because they are group stage that's why we are conserving energy.
"If we're not playing the best it's because it doesn't matter — if we're the first or the second (in the group) we're already through. The most important thing is the elimination match tomorrow."
The South Koreans filed a protest with the referees.
"It's not like the Olympics spirit to play like this," said head coach Sung Han-kook. "How could the No. 1 pair in the world play like this? They start playing mistakes. Their attitude is absolute crap."
Australia coach Lasse Bundgaard blamed the group format for the controversy.
"It's not good when you create a tournament where the players are put in this situation," he said. "If you can win a medal by losing, but not by winning, that's not a good situation to be put in.
"I totally understand why they are doing it. Now the Indonesians are doing the same but it's not a good situation to be put in."
Jauhari said she couldn't understand why the Korean coaches protested their amount of errors.
Polii added: "The referee said to us you are not playing very seriously and since he said that we felt intimidated and disturbed."