It's exactly the same as the dynamic hedging argument introduced by Black-Scholes. I mean if you know how to drive the BS formula, you should know how to replicate an european option. Besides the underlying you also need a money market account but that is not easy to get because you need an account that you can lending and borrowing money very frequently (e.g. daily basis). Especially for call option, you need to borrow money and then buy a certain amount of stocks.

可以详细点不，比如BS公式第二个部分，是融券做空吗？非常感谢！

对于call option是融资买入，对于put是融券做空。你说的是看涨期权，所以我说是融资买入。BS call option的第二部分相当于是以一定概率short K份bond，short bond不就是问别人借钱（融资）么？