惠通科技：全资子公司惠通生物的聚乳酸切片目前仅完成首次投料试车，还处于问题复盘和整改优化阶段

Group 1 - The company, Huitong Technology (301601.SZ), is involved in the production of biodegradable materials and provides engineering contracting services for related equipment [2] - The company's subsidiary, Huitong Bio, has completed the initial trial run of polylactic acid (PLA) chips, which is currently in the problem review and optimization phase [2] - The company acknowledges that its downstream clients are directly involved in the production of biodegradable films, indicating a connection to new agricultural practices and rural revitalization [2]