冬至

It is a cold night in the middle of winter. It is very cold in Harry's town. But Harry's house is warm.

He reads in the kitchen. He learns about a Chinese doctor and his invention. The doctor was called Zhang Zhongjing.

It was very cold in Dr. Zhang’s city. The people could not stay warm.

Dr. Zhang saw many poor people. They had no hats. They could not cover their ears.

Many people had red, sore ears. Dr. Zhang was kind. He wanted to help them.

Dr. Zhang made something warm for the people to eat. He took a big pot of hot water.