Ballpoint pen, water and eraser.

Oily pen, wipe with alcohol.

Don't wipe it. The signature strips of bank cards are generally "fragile" designs with special treatment. After scraping or painting a Chinese character with a knife, the underlying English "invalid" characters will appear, which is easy to be misunderstood. Anyway, salary cards are usually debit cards. ATM use and POS card swiping are based on passwords, so it doesn't matter what you sign.

If you really look unhappy, you can report the loss, get a new card later, and then report the new card number to the finance department for them to update. It usually takes 10 yuan to get to 20 yuan.