国债期货开盘，30年期主力合约跌0.05%

Group 1 - The core point of the article indicates that the opening of government bond futures shows mixed performance across different maturities, with the 30-year contract declining slightly while shorter-term contracts experience slight increases [1] Group 2 - The 30-year main contract decreased by 0.05% [1] - The 10-year main contract increased by 0.02% [1] - The 5-year main contract rose by 0.01% [1] - The 2-year main contract also saw an increase of 0.01% [1]