The second question, actually, I don't quite understand what you mean. Generally, before the option buyer exercises, the daily settlement is only the royalty, which has nothing to do with the futures contract price and the exercise price. If the buyer fails to close his position on the expiration date, he will exercise according to the trading rules stipulated by the exchange, and the American option can exercise before the expiration date. If it is a call option, the buyer will get a long future positions according to the strike price of the option contract. Specifically, according to the trading rules, some foreign countries only implement real options, while virtual options and equivalent options are not implemented.