How to buy Crypto on Alipay?

As a curious investor, I'm wondering about the process of purchasing cryptocurrencies through Alipay. Could you provide a step-by-step guide? I'm particularly interested in knowing if there are any special requirements or verifications needed before making a purchase. Also, I'd like to understand the supported cryptocurrencies and if there are any transaction fees associated with using Alipay for these types of transactions. Additionally, I'm curious about the security measures Alipay takes to ensure the safety of user funds and transactions. Thank you for your assistance in clarifying this process.