I have a postal savings credit card. I received a call from customer service today, saying that it was a reward for high-quality customers, and there was a limited edition (only 10000 sets).
Like you, I said that the Postal Savings Bank gave back to high-quality customers, and the Postal Savings Bank only won a limited number of 5,000 sets, and the rest were purchased through other channels. What he said was exactly the same as what he said, and he also sent a golden key and a preface to Lanting. I couldn't resist the temptation to buy it, but I still think it's worth it. It feels good, and it doesn't look fake, but I don't know where the appreciation space is.