If a driver discovers personal belongings (such as a smartphone, wallet, or luggage) left behind by a passenger after they disembark, what is the mandatory standard protocol?

1. Keep the property secretly and pawn it at a second-hand market
2. Immediately report the found item to platform customer service, preserve the item safely, and actively cooperate to return it to the passenger or surrender it to the nearest police station / lost property center
3. Throw the belongings into a roadside garbage can to avoid hassle
4. Post photos of the lost wallet on the internet and demand a 50% finder fee