从彼得堡回来三年了，开始用俄语教乌克兰同学汉语了

The undergraduate is a Russian major, and after graduating for one year, I have not spoken Russian for a long time.

Graduate students studied Chinese as a foreign language and had only been taught in English before.

In recent days, several Ukrainian students want to learn Chinese, so I began to pick up Russian again, prepare for classes seriously, and cheer up!