There is a congratulatory letter on her umbrella. That's why it's expressed like this. There may be other meanings, and further communication can be confirmed. Umbrella is a tool for shading or sheltering from rain and snow, and is generally made of oil paper, oilcloth or plastic cloth. Umbrella in English comes from Latin Umbra, which means shade and shadow.

Umbrellas are usually made of malleable cloth and other materials and wound wires that can be used as skeletons. When in use, lift the umbrella by hand. Although the umbrella was originally invented to block the sun, it is most often used as a tool to block the rain in rainy days. Other functions of umbrellas include being used as decorations, crutches and even weapons. Hong Kong's time-honored Liang Suji umbrella is one of the umbrellas that can be used as weapons.

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In ancient times, rainy days and hot summers plagued people, and people had to hide under small pavilions and could not go out. There is a legend that Luban built many pavilions around his neighbors for everyone to use, but he still couldn't let people in and out freely in the stormy season.

Lu Ban's wife then made a lightweight bamboo pavilion out of oil paper according to the style of the pavilion built by her husband-this is the earliest umbrella. Lu Ban's wife said to Lu Ban, "The house you built can't be moved. My umbrella can be taken with me and can provide protection all year round. "