Wang Zhouyu won the women's 87 kg class on Monday to give China its sixth gold medal in weightlifting at the Tokyo Olympics.
The 27-year-old lifted a combined weight of 270 kg, a comfortable seven kilograms more than Ecuador's Tamara Salazar who took silver with 263 kg.
Dominican Republic's Crismery Santana claimed bronze with 256 kg.
Wang led after completing a lift of 120 kg at her third attempt in the snatch following an unexpected failure at 115 kg on her first attempt.
In the clean and jerk, she failed in a bid to lift 160 kg to break her record set at the 2019 world championships.