China collected a clean sweep of five gold medals at London 2012, however it was a different story in Brazil as its women shuttlers and superstar Lin Dan left empty-handed.
That poor return played a major role in China slipping behind Great Britain to finish third in the medals table - the first time they have finished outside the top two since the Sydney Games in 2000.
The women's singles had its first non-Chinese winner since the Atlanta Games 20 years ago after Li Xuerui failed to defend her title won in London, losing in the semi-final.
"Our team is strong and we've tried our best to perform well but now it's really competitive," the 25-year-old explained.
Also Read
"These days the challenge is much more competitive worldwide. Every team is showing they are strong and powerful," Li added.
Marin later hailed her gold medal as one "that broke the Asian world" and with the Spaniard only 23 years old it could be a European country that commands future women's singles titles.
Japanese duo Misaki Matsutomo and Ayaka Takahashi beat Denmark in the final for gold with the former declaring it had been their goal to "break China's dominance".
Earlier in the week both of China's pairs, including double London gold medallist Zhao Yunlei, lost in the last-four of the mixed doubles, which was eventually won by Indonesia.
Chen Long beat Malaysian Lee Chong Wei in the men's
singles final to grab China's second gold but the departure of Lin Dan is perhaps the biggest threat to Chinese dominance.
Lin towered over the sport for at least a decade but at 32, Rio was all but certainly his last Games and it was not the end to a glorious career that he would have wanted.
Chen is only 27 but was taken to three games by future star Axelsen, who at 22 could be favourite for a gold medal at Tokyo in four years' time.
With Zhao, who turns 30 shortly, also expected to announce her retirement soon, and Fu aged 32, China needs a new generation of younger players if it's to keep its grip tightly on Olympic gold medals.