According to @PolynomialFi, the platform announced zero-fee trading for ETH and BTC while welcoming Chinese-speaking traders via an X post on Oct 8, 2025 (source: @PolynomialFi on X, Oct 8, 2025). According to @PolynomialFi, the announcement did not include additional details on duration, eligibility, or specific market type beyond ETH and BTC in the post (source: @PolynomialFi on X, Oct 8, 2025).