ETF开盘：长江保护ETF领涨7.02%，一带一路ETF易方达领跌2.04%

Group 1 - The ETF market opened with mixed performance, with the Yangtze River Protection ETF (517330) leading the gains at 7.02% [1] - The Sci-Tech Machinery ETF (588850) increased by 5.13%, while the Engineering Machinery ETF (560280) rose by 3.97% [1] - On the downside, the Belt and Road ETF from E Fund (515110) fell by 2.04%, and the S&P Oil & Gas ETF (159518) decreased by 1.53% [1][1] - Another S&P Oil & Gas ETF (513350) also saw a decline of 1.25% [1]