Forced liquidation is calculated according to the total amount of funds in your account. If your loss reaches a certain proportion of the funds in your account, you will be forced to close your position. I assume that 5000 yuan is the proportion set for you by your futures company. If the primary futures is 10 ton, then you will be liquidated if you lose 5,000 yuan, that is, if you buy 4,000 yuan a ton, then the price will be liquidated if it falls to 3,500 yuan. The reference standard is the funds in your account.
2000 deposit, calculated at 10% and 10 ton per lot, then the first-hand value is 20000 yuan. As long as the price is reduced by half, your 10000 yuan will be gone and it will be even.