黄旗海是一封闭湖泊，气候是控制其湖面变化的主要因素。
Huangqihai lake is an inland closed lake. Climatic change is a major factor to control the lake level fluctuations.
蓝旗用来显示发掘地的周长，而黄旗用来标明发掘出化石或石制工具的地点。
Blue flags define the excavation perimeter, while yellow ones mark the location of fossils or stone tools.
来自国外港口的船舶白天进港须挂检疫黄旗，检疫结束后降下，夜间用三盏红灯替代。
Yellow Flag must be hauled up for vessels from foreign countries daytime and be hauled down only after free pratique granted. Three red lights should be switched on during nighttime as substitute.
来自国外港口的船舶白天进港须挂检疫黄旗，检疫结束后降下，夜间用三盏红灯替代。
Yellow Flag must be hauled up for vessels from foreign countries daytime and be hauled down only after free pratique granted. Three red lights should be switched on during nighttime as substitute.
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