I believe you have often seen that various Warcraft players have a large number of low-priced monthly cards for sale, and the prices are also ridiculously low. Of course, some of them are payment methods similar to other servers. Relatively speaking, they are safe. Not very sexy.
Players can choose to recharge at the time badge in the official server.
You can log in to some trading platforms yourself, and then select the World of Warcraft Asian server to search.
Screen the gold coins and price ratios in each area and compare them to get the cheapest point card.
But the most reliable way is to recharge in the game.