张家口康保县又出了“甲醛白菜”，愤怒的舆论口诛笔伐。
(ECNS) -- The first phase of the middle route of China's South-to-North Water Diversion Project had transferred more than 80 billion cubic meters of water to northern China as of Friday, directly benefiting nearly 118 million people, according to the Changjiang Water Resources Commission. The water comes mainly from Danjiangkou Reservoir, where managers balance reservoir inflows, local demand in the Hanjiang River basin, northbound supplies, and downstream ecological needs. This summer, after forecasts pointed to below-normal rainfall, authorities adjusted reservoir operations to retain about 1.5 billion cubic meters more water as a buffer against possible drought. Technology is playing a growing role in monitoring water quality. An AI-powered floating platform works alongside satellites, drones, and ground monitoring stations, feeding data into a digital twin of Danjiangkou Reservoir that tracks water quality, simulates flood scenarios, and supports emergency planning. At Danjiangkou Reservoir, the core water source for the middle route, an autonomous vessel collects samples from different depths to monitor algae. Using AI-powered microscopy, the floating station identifies microorganisms quickly and tracks algal activity, giving early warning of blooms. The vessel is part of an integrated satellite, aerial, surface, and structural monitoring network that combines remote sensing, drones, ground-based stations, and sensors embedded in the dam. By fusing multi-source data in real time, the system has shifted water monitoring "from isolated points to full-area coverage," said Cui Dongdong, deputy director of the technology development department at a company under the Yangtze River Water Resources Commission of the Ministry of Water Resources. With the digital platform, a regulation plan that once took days to produce can now be generated in seconds. The platform runs more than 15 professional models covering flood routing, pollutant dispersion, and dam structure simulation. The 1,432-kilometer middle route canal carries water across the Yangtze, Huai, Yellow, and Hai river basins before it reaches households in the north. Water quality has also improved, and the nationally protected "crystal jellyfish," known as the "giant panda of the water," is now sighted frequently in the reservoir, an indicator of excellent conditions. (By Helen Mo, intern Yang Hongran)
。张家口的调查组已经进入现场，老胡相信这件事将很快被查清来龙去脉，肇事者将受到严厉处罚。
B | “甲醛白菜”从2012年进入人们视野以来，中间经过14年，就是根除不了。这是因为用甲醛保鲜成本低，诱惑力极大，再重的舆论声讨和处罚风险，也挡不住被抓住低概率和高回报对不法之徒的诱惑。北方地区因为产大白菜，运输多为短途，吃到“甲醛白菜”的几率比较低，但远离大白菜主产区的地方，这个风险的“幽灵”时不时就会出没。
据多家媒体采访业内人士和专家得出的估算，一桶工业甲醛不过几十块钱，能让一车十几吨的白菜多撑两三天，刚好覆盖跨省远途运输的窗口期。在白菜这种按“分”算利润的农产品里，省下的那些钱都是中间商实打实的纯利，有的商贩就因利弃义了。然而一些专家指出，很多人以为保鲜只有两条路：要么用甲醛这种邪招，要么全程上冷藏车。但其实中间还有一条“准冷链”。
C | 上海市农业科学院研究员乔勇进接受媒体采访时表示：“大白菜含水量达95%，采摘后呼吸旺盛，采后预冷是十分关键的环节。通过差压预冷等技术，可以在24小时内使菜体中心温度降至0—1℃。
D | ”《中国蔬菜》等专业媒体表示，蔬菜在经过预冷之后，用竹筐、夹冰瓶等把这份“冷气”尽量长久地锁住，就能延长一定保质时间，这样普通货车也能跑。10吨菜用甲醛是几十块，用这套“准冷链”多花几百块钱，摊到每公斤也就多花几分钱，从河北运到长三角，零售一斤也就贵不到一毛钱。
E | 老百姓完全承受得起，也愿意花。但是要把“准冷链”运输搞起来，中间商自己搞不了，田头要有冷库，大白菜装车点得有快检甲醛倒逼，到了消地批发端商家得认，而不是看菜根白不白。现在北京上海等一线城市防“甲醛白菜”做得比较好，倒逼力量强大，蘸了甲醛的白菜一般不太敢往那些地方运。然而只要市场配合不完善，监督体系不完整建立起来，使用甲醛保鲜的邪招就能找到可以钻的缝隙。
F |
有人提议在康保这类夏菜外运大县，可考虑利用现有产地冷藏保鲜设施补贴，多在村口建共享预冷点，那样收购商就可以在砍菜后一小时内，把菜温从25℃降到4℃，按吨付几块钱。呼吸热一降，后面加冰筐就行，“准冷链”成本直接压到几百元以内。根据《中国农产品产地冷链物流发展报告（2024）》显示，“十四五”期间,全国产地冷库库容预计新增约2亿立方米,建设培育了1000个具有仓储保鲜等能力的产地冷链集配中心，产地“最先一公里”的冷链设施正走向田间地头。第二，装车点要强制快检。有律师接受记者采访时表示：“甲醛属于违法添加的非食用物质类型，虽然能够保鲜，但会导致食品安全产生风险。”尽管甲醛快速检测试纸的结果可能受到样品和操作条件等因素影响，但便于初筛，所以应该在田头收购点配几块钱一条的试纸，装车前随机抽，一旦发现问题，最终核验确切检出，就用刑责兜底，整车扣押，按生产销售有毒有害食品查办，而不是罚几千块钱了事。那样一来违法代价的预期就会变成倾家荡产。第三，专家们建议，要让中间商更有动力守规矩。销地批发端要对持有“无甲醛检测合格证”的合规菜品给予微量溢价，一车多回几百块钱，刚好覆盖“准冷链”的花费。那样一来，转运经销商结账后会发现“不蘸甲醛比蘸甲醛赚得多”，不用劝，他们自己就会全都把甲醛桶踢了。第四，消费者看得见“无甲醛”才愿意一斤菜多付一毛钱左右。商超菜场应该有最终确认大白菜经过了上述合规转运的能力，应建立严格溯源码制度，要标到产地的镇、标到运输的车、标到菜的批次，有了这一套保障，让大家多花几分钱或一毛钱买一斤大白菜，我相信很多人都会很开心。意愿变成实际溢价，钱才能顺着链条流回田头。从长远看要彻底解决甲醛问题，这四根柱子缺一不可。只建共享冷库，没有甲醛快检，商贩就会绕开；只有快检，但是没有溢价，合规者就会吃亏；只溢价不溯源，钱可能被中间某个环节截走，结果是消费者被耍。
现在北京新发地等全国一线城市大型农产品批发市场的做法越来越严格，总体看，中国的食安水平是不断往前走的，我们无需因为又出了一次“甲醛白菜”事件就过度灰心，我们要做的是以解决每个出现的问题为导向，形成食品安全建设的真实加速度。发达社会的重要标志之一就是食品安全的保障性，大幅提升市场销售蔬菜的可溯源性非常高，很细致。而推动食品安全体系不断建立起来的动力是人们的强烈要求以及总的生产力水平的提高、人们也有能力消费更加安全的食品。老胡认为今天的中国已经到了这样的转折点，加强食品安全并非我们社会的负担，而是新的发展机遇和动力。
G | 让我们的整个生产和供应链，都拒绝以牺牲安全为代价朝着低价卷，而要朝着公众能够消费得起的更高食安水平向上竞争。
H | 无论是“甲醛白菜”还是“毒草莓”，都应该彻底退出中国人的餐桌了。
。张家口的调查组已经进入现场，老胡相信这件事将很快被查清来龙去脉，肇事者将受到严厉处罚。