Even if the bank sues you, you need them to take something to prove that you participated in the training, which is worth 60 thousand yuan. Think for yourself. Have you signed up for the training class? Is the bank class worth 60 thousand? If they can't prove it, they can't ask you for money.
Even if it's your turn to lose money, you've been working for 4 months, and the agreed service period is only one year, which is equivalent to 8 months you didn't do, which is a breach of contract and only bears 3/4 of the liquidated damages.
If you really want to leave your job, skip work or go to work, the bank can't wait to get you out. At that time, the bank will take the initiative to cancel the contract, and you can't be considered a breach of contract.