The night rain was continuous and continuous, as if it was soaking the entire ancient city in endless dampness and coldness. Dense raindrops beat on the black tiles, gathering in strings and hanging from the edge of the eaves tiles. A hazy and swaying water curtain hangs in front of the two slightly mottled maroon wooden doors of the "Jishitang" medical center. The rainwater slid down the weather-beaten plaque with strong handwriting on the lintel, glowing faintly under the dim yellow street lights.