A股市场低开高走，海南自贸区概念大涨，多股午后扩大涨幅

Market Overview - A-shares experienced a low open and high close today, with major indices rising to varying degrees, and over 4000 stocks closing higher [1][3][6] - The Shanghai Composite Index rose by 0.34%, the Shenzhen Component Index increased by 0.85%, and the ChiNext Index gained 0.7% [3] Sector Performance - The agriculture, forestry, animal husbandry, and fishery sector led the gains with an overall increase of over 1.5% [3] - Basic chemicals, steel, non-ferrous metals, and electronics sectors also saw increases, each exceeding 1% [4] - The banking and coal sectors were among the few that declined [5] Notable Stocks - The Hainan Free Trade Zone concept stocks surged, with Hainan Ruize hitting the daily limit, and Shennong Seed Industry increasing nearly 9% [5] - Haichang New Materials saw a rapid rise, with an intraday increase close to 19%, and total trading volume exceeding 500 million yuan, more than ten times the previous trading day [7] - Silin Jie expanded its gains to over 9%, closing up 8.26%, with trading volume reaching 114 million yuan, over three times the previous day [9] Hong Kong Market - The Hong Kong market saw a slight decline, with the Hang Seng Index closing down 0.34% [1] - The robotics sector was a highlight, with companies like Yujian Robotics rising nearly 10% and reaching a peak increase of nearly 14% during the day [14] - A strategic cooperation agreement was signed between Green Source Group and Yujian Technology, aiming to apply 5000 robotic dogs in smart store upgrades [14]