This is a kind of fraud. I suggest you don't try it easily yet. If you want to pay a deposit first, you must refuse.

Going to the factory to fill in the number of people is because it can create a sea of people and let more people who don't know the truth sign up. The main productivity of electronics factory is that no matter how big the electronics factory is, no one can make money. Moreover, outsiders are more controllable. Usually they don't have that much trouble. If some news of local people spreads quickly, some information about their venues will be bad.

Keep your eyes open when looking for a part-time job. After all, there are too many part-time scams now, so as not to be deceived.