First, different radicals
1, the radical of qi is water, and "qi" is next to the word "yes".
The radical of _ is autumn, and _ is next to the word "one".
Second, the meaning is different.
1, Qi: It means happiness and auspiciousness, and is often used in personal names or business letters.
2._: The ancient word "_" means straw sandals and towels.
Third, the usage is different.
1, "Qi" is the language used to express congratulations in letters. Such as Jin Qi, Wen Qi and Shi Qi.
2. "_" was used in ancient daily life, but it is rarely used in modern times.
Extended data
Qihe's stroke order
1 and Qi's strokes are 12, which are points, horizontal/horizontal hooks, vertical, points, horizontal, vertical, horizontal, horizontal, vertical and dot respectively.
2. The strokes of _ are 13, which are points, horizontal strokes/horizontal hooks, vertical strokes, vertical strokes, points, horizontal strokes, vertical strokes, horizontal strokes, horizontal strokes, vertical strokes and points.