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8月17日，市民在位于承德滨河湿地公园南互通高速桥下的运动场地内打乒乓球。 A Chinese research team has completed an updated geologic map of the entire moon featuring a scale of 1:5 million, the Institute of Geology, Chinese Academy of Geological Sciences (IGCAGS), said on Thursday. Representing a significant scientific iteration from the 2024 version, this map effectively rewrites the moon's geologic history based on the latest research findings. "The lunar geologic history has indeed been rewritten -- more precisely, refined and systematized," said Yang Zhiming, director of the IGCAGS. Specifically, a primary achievement of this update is the recalibration of the moon's ancient geologic eras. The new map systematically updates the age boundaries of the moon's three ancient geologic periods, namely the Aitkenian, Nectarian and Imbrian periods, drawing on recent advances in international chronology. Crucially, Chang'e-5 samples confirmed volcanic activity on the moon as recently as 2 billion years ago, extending its geologic lifespan by 1 billion years from the previously accepted 3 billion years. This independent dating data has now become a cornerstone of the global lunar geologic timescale. Highlighting these spatial discoveries, the new global lunar geologic map is the first comprehensive canvas to bear exclusive findings from the Chang'e-6 mission. "The lunar samples and this map will provide a new starting point for scientific discussions regarding the lunar far side," said Jin Ming, an associate researcher at the IGCAGS. The map details the age of young mare basalts on the lunar far side obtained from the Chang'e-6 samples, recording the region's volcanic history. Furthermore, it reveals that KREEP rocks, enriched with rare earth elements and other strategic resources, are far more continuous and abundant in the Oceanus Procellarum than previously estimated. This discovery, achieved by eliminating spectral noise, prompts a systemic reevaluation of the moon's early magma ocean crystallization and internal thermal evolution. Beyond its scientific data, the 2.8-by-1.2-meter map introduces a proprietary cartographic standard. Identifying over 13,500 impact craters and 81 basins, it employs a unique color scheme rooted in geologic logic and traditional Chinese aesthetics, following a "lighter for younger, darker for older" principle. Furthermore, this standard will also be applied to future geologic mapping of Mars and asteroids, ending reliance on foreign standard systems. "This goes beyond showcasing technological soft power. This standard will be extended to future planetary geologic mapping, establishing an independent intellectual property framework for China's deep space exploration," Yang said. 
。日报记者 陈宝云摄8月17日清晨，记者来到承德滨河湿地公园。滦河边的南互通高速桥下传来乒乓球撞击台面的清脆声响，与流水声交织在一起。
B | 走进桥下空间，记者眼前一亮，这里俨然一个热闹的健身乐园。乒乓球台前，几位市民正挥拍激战。不远处的篮球场上，年轻人在晨光中运球投篮。头顶不再是冰冷的水泥面，而是绘成了蓝天白云。
C | 四周的桥柱上绘满彩画，让原本灰暗的桥下空间焕发出生机与活力。“以前桥下就是一片空地，长满杂草，没人愿意来。”正在打乒乓球的市民张旭阳说，自从这里改造成运动场地后，他几乎每天都来。
D | “头顶‘蓝天’，身边有花有草，打球的心情都不一样了。”张旭阳说。承德地处山区，城市可用空间有限。如何在寸土寸金的山城里让市民就近运动健身？承德向“边角余料”要空间——立交桥下、河岸绿道、街角口袋公园……很多过去被忽视的“金角银边”，经过改造成为市民身边的“微运动场”。记者从承德市体育局了解到，近年来，承德在滨河湿地公园南互通高速桥下、双峰寺高速桥下、武烈河大桥下等地，建设了200余处综合运动场地，涵盖篮球场、足球场、排球场、羽毛球场、乒乓球场、轮滑场等。在武烈河沿岸的绿道，记者看到，健身步道上晨跑、散步的市民络绎不绝。河畔新增了不少智能健身器材，市民在锻炼时可实时了解运动数据。“从家走到这儿用不了10分钟，器材新、环境好，每天我都要来一趟，身心特别舒畅。”在河畔锻炼的市民李颖说。在双峰寺高速桥下，综合球类场地同样人气旺盛。足球场上，孩子们追逐奔跑；羽毛球场边，等候上场的市民排起了队。“桥下晒不着淋不着，一年四季都能运动，比去体育馆还方便。”带孩子来桥下踢球的家长陈晓勇说。从“被遗忘的角落”到“家门口的运动场”，承德用“绣花功夫”盘活城市存量空间，让“15分钟健身圈”从规划图变成了市民触手可及的现实。截至目前，承德市运动场地达1.2万余个，人均场地面积约3.18平方米，经常锻炼的群众超四成，全民健身蔚然成风。（日报记者 陈宝云）。
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