I lost my Russian entry card.

After the Russian entry card is lost, find the foreign affairs office of the school and then contact the immigration office. The school will tell you what to do. Do it again and pay some fines.

The "Russian Entry-Exit Card" is a card that foreign citizens need to fill in when entering and leaving Russia's border defense, which is used by border inspectors for inspection and statistics. The "entry and exit card" is completely different from the work card and household registration and cannot replace each other.