In which solar term will the Tropic of Cancer pass through the four provinces from west to east every year?

The Tropic of Cancer runs through four provinces from west to east: Yunnan, Guangxi Zhuang Autonomous Region, Guangdong and Taiwan Province Province.

Every year, during the "summer solstice" solar term, there will be direct sunlight.

The Tropic of Cancer is the northernmost latitude line where solar energy shines directly on the ground, with a latitude value of 23 26 ′ n, and the sun can shine directly on the Tropic of Cancer every summer to Sunday. It is only one day every year, and the direct point of the sun at other times is south of the Tropic of Cancer.