It is difficult to be a vegetarian in China, and I feel the same way. Of course, it is more difficult to live in a small city and more difficult to live in a company. But this is not impossible:

Prepare some fruits for yourself every week, and prepare some cucumbers and tomatoes at the same time. Fried potatoes with lard can completely replace a meal.

Buy a small refrigerator, prepare some vegetables and make yourself some cold dishes when you have time;

If you want to lose weight, steamed bread rolls are also vegetarian, but it is recommended to eat less;

Someone mentioned vitamin B 12. Yes, vegetarians need everything from food, but they will lack vitamin B 12, so prepare some.