Canada-I lost my immigration paper and green card, but I want to return to China in a short time and come back in September. Is there any way to apply for a visa quickly?

Do you keep copies of these two documents yourself? Because you don't have these two things now, if you leave Canada like this, it will be very difficult to apply for a visa to return to Canada at the Canadian Embassy in China.

In this case, you'd better call CIC, the Canadian Immigration Department, and ask them to give you a safer and more feasible method. And tell them that you need to go abroad. In this case, they can deal with it urgently. It usually takes less than a month to get it done.