300503、301005，午后快速涨停

Group 1: Robotics Sector - The robotics concept continues to rise, with companies like Haozhi Electromechanical (300503) hitting the 20% limit up within just 3 minutes of trading [2] - Other stocks in the sector, including Shoukai Co., Daye Co., and Fenglong Co., also reached their limit up, indicating strong market interest [2] - Efort-U saw an increase of over 14%, while Zhejiang Rongtai and Julun Intelligent also experienced gains [2] Group 2: Commercial Aerospace - On December 25, Hangzhou Yundongchu Technology Co., completed a multi-hundred million yuan Pre-IPO financing round, led by the National Artificial Intelligence Industry Fund with participation from JD.com [4] - The commercial aerospace sector is also seeing significant growth, with Chaojie Co. (301005) quickly reaching the 20% limit up, alongside other companies like Guanglian Aviation and Boyun New Materials [4] - The Tianlong III reusable rocket, developed by Tianbing Technology, is set to conduct its maiden flight soon, further boosting interest in the commercial aerospace industry [4]