（文章来源：证券日报） 证券日报网讯 12月12日，中国交建在互动平台回答投资者提问时表示，疏浚业务是公司主营业务之 一，是世界最大的疏浚公司，业务范围主要包括基建疏浚、维护疏浚、环保疏浚、吹填工程、流域治理 以及与疏浚和吹填造地相关的支持性项目等。 ...

作为项目参建单位，中交(天津)疏浚工程有限公司烟台项目部承建了码头施工部分。施工过程中，项目部坚持质量为本，将特殊过程和关键工序作为重点 进行严格控制，显著提升工程质量和建筑观感。筑牢安全防线，贯彻"安全第一，预防为主"方针，强化安全意识，杜绝了各类安全事故，圆满达成既定安 全目标。紧盯进度目标，实行挂图作战，科学分解、细化任务节点，提升信息流转效率，强化团队协作，确保高效推进。凭借卓越表现，项目施工队伍荣 获"攻坚会战卓越单位"称号。 12月5日，烟台LNG项目现场召开"攻坚会战奏凯歌，凝心聚力唱未来"——180天会战总结表彰暨决战投产动员大会。山东省能源局领导、业主单位及参建 单位代表共计200余人出席，共同见证这一国家能源战略重点工程的里程碑时刻。 本次"180天会战"充分展现了团队"敢打硬仗、能打胜仗"的过硬作风，荣誉属于每一位日夜奋战的参建者。下一步，中交(天津)疏浚工程有限公司烟台项目 部全体人员将继续凝心聚力，胸怀"国之大者"，勇担央企责任，全力以赴保障项目顺利投产，为建设绿色烟台、美丽山东贡献中交力量。 (通讯员孙志伟) ...

Core Viewpoint - The successful sea trial of China's self-designed and built ultra-large dredging vessel "Tongzhen" marks a significant advancement in the country's maritime capabilities, filling a gap in the market for dredging vessels with a capacity of over 35,000 cubic meters, and providing essential support for national marine development and the Belt and Road Initiative [1][3]. Group 1: Vessel Specifications and Performance - "Tongzhen" is the first ultra-large dredging vessel in China with a capacity of 35,000 cubic meters, boasting a maximum capacity of 38,168 cubic meters, ranking first in Asia and second in the world [3]. - The sea trial lasted five days, during which 30 major and 91 minor tests were conducted, validating the vessel's core performance in navigation, dredging, and intelligent control systems [3][4]. - The vessel demonstrated excellent stability and maneuverability in complex sea conditions, with key indicators meeting or exceeding design standards [3]. Group 2: Technological Advancements - The intelligent performance of "Tongzhen" was verified through the "Intelligent Dredging Control System" and intelligent navigation systems, achieving full-process intelligent control from precise navigation to efficient dredging operations [3]. - The intelligent operation mode covers the entire chain of "dredge - transport - discharge," showcasing an internationally leading level of automation [3]. Group 3: Future Applications - The vessel is expected to be widely applicable in various construction scenarios, including port dredging, land reclamation, coastal maintenance, deep-sea sand extraction, and deep-sea trench excavation and backfilling [3].

Core Viewpoint - China Dredging Environmental Protection (00871) reported a revenue of 146 million yuan for the first half of 2025, representing a year-on-year decline of 11.2% [1] - The loss attributable to the company's owners narrowed to 21.28 million yuan, a decrease of 32.5% compared to the previous year [1] - Basic loss per share was 1.42 cents [1] Revenue Breakdown - The infrastructure and reclamation dredging segment recorded revenue of approximately 19.3 million yuan, which is an increase of 150% compared to the same period in 2024 [1] - The revenue growth in the infrastructure and reclamation dredging segment was primarily due to an increase in projects undertaken by the group during the reporting period [1]

Core Viewpoint - The "Junlan" vessel, designed and built in China, is the world's largest all-electric, detachable, environmentally friendly dredging ship, specifically tailored for the management of the Guanting Reservoir [1][2]. Group 1: Vessel Features - The "Junlan" vessel is equipped with a fully electric-driven excavation system, featuring a 600 kW cutter head that can dredge 2,000 cubic meters per hour, which is three times more efficient than traditional equipment [2]. - It incorporates an intelligent control system that optimizes operational parameters based on soil conditions, allowing for remote control and precise adjustments of output power [2]. - The vessel is designed for low carbon emissions, utilizing a high-pressure shore power connection and a new type of environmentally friendly cutter that minimizes disturbance to surrounding water bodies, achieving "zero leakage excavation" [2]. Group 2: Project Impact - The completion of the dredging project will significantly enhance the self-purification, flood control, power generation, and water supply functions of the reservoir [2].

Core Viewpoint - The introduction of the "Junlan" environmentally friendly dredging vessel marks a significant advancement in the dredging industry, particularly for the ecological restoration and management of the Guanting Reservoir, which has accumulated 650 million cubic meters of sediment over time [1][2]. Group 1: Vessel Features and Technology - The "Junlan" vessel is the first in the "river-lake" dredging equipment sector to utilize a fully electric drive excavation system, featuring a cutter power of 600 kilowatts [1]. - The dredging efficiency of the "Junlan" is three times that of previous equipment, achieving a standard dredging volume of 2,000 cubic meters per hour, equivalent to emptying a standard swimming pool every hour [1]. - Designed specifically for deep water lakes, the vessel can excavate to a depth of 25 meters, and with additional deep-water modules, it can reach a maximum depth of 60 meters, ensuring precise dredging of contaminated sediment without disturbing surrounding water bodies, achieving "zero leakage excavation" [1]. Group 2: Project Impact and Goals - The Guanting Reservoir dredging pilot project aims to remove 11.5387 million cubic meters of contaminated sediment, addressing various technical challenges such as deep excavation, complex soil conditions, long transportation distances, and high environmental standards [2]. - The completion of the dredging project is expected to significantly enhance the self-purification capacity of the Guanting Reservoir, improve water quality, and strengthen the reservoir's flood control, power generation, and water supply functions, thereby supporting the ecological and economic development of the Yongding River basin and laying a solid foundation for restoring the capital's strategic water source functions by 2035 [2].