2. These three ways mean that Spanish banks have different communication ways to inform China banks to pay. Remittance informs China Bank of payment by mail, telegraphic transfer informs China Bank of payment by computer, and telegraphic transfer informs China Bank of payment by draft (not directly from Spain to China Bank, but by communication, China Bank of payment, and after China Bank pays, Spain transfers the account to China Bank by computer. This process only takes 2.3 seconds, and the cost you pay is the communication fee! That is, the Spanish informed the Bank of China to pay the communication fee. You can understand that Spain called the Bank of China to ask him to pay, and you paid their phone bill)
T/T is the fastest and the price is the highest. The latter two are similar, but slower than T/T, but cheaper. Choose for yourself!
4. When the euro is remitted to China, due to the principle of "buy strong and sell weak" in foreign exchange control, your euro must be sold to the Bank of China, and the Bank of China will convert it into your RMB!