A friend of mine wrote a letter to Real Madrid in 2002. I don't know what else was sent in the attached letter. My sincerity is far worse than yours. ) I asked for Raul's autographed photo. A month later, he received a reply, a postcard signed by Raul and a family photo of Real Madrid. He's so excited.
I heard that the response rate of Real Madrid is not high, after all, there are too many letters received, but I heard that sending something will especially improve the response rate. You have a lot of special things. It's bound to attract attention. I think the success rate is very high. Wish you success!
In addition, I want to remind you that you'd better write your return address in Chinese, English and Spanish. Be sure to write clearly. Especially English.
Let me remind you again that the Barcelona paper man you pierced is a bit unkind. Second, this is China culture. People born after China 1990 may not understand. Do you expect foreigners to understand? Maybe I misunderstood that you were angered by Barcelona fans, and that was all wet. I suggest not to put it.
By the way, I forgot to mention the postage. Generally speaking, airmail is the most affordable. According to the weight, I remember that it is 20g to send to Spain, 6 yuan or 7 yuan. So if it is just a letter, it is very cheap. But your things don't look too light. . . The specific postage will be weighed then. You can also use UPS or DHL. It seems that DHL is 5KG in Europe and 5KG in 800 yuan.