The temporal and spatial characteristics of surface water quality in Jiyun river are analyzed based on environmental measurement data.

通过对不同时段和不同监测点环境监测数据的对比分析，研究蓟运河干流地表水质的时空变化特征。

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Leipian inherits the achievement in the Fanqie phonetic transcription in Jiyun with innovation, showing the progress in language research and lexicography in the Tang and Song Dynasty.

《类篇》反切注音在《集韵》基础上有所继承和革新，反映了唐宋时代语言研究和辞书编纂领域的进步成果，具有重要的研究价值和重要的现实意义。

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