My name is [Your Name], and I am a professional foreign trade sales executive specializing in [product category], including [product names].

无法直接删除已经发送到对方QQ的消息，因为QQ的消息一旦发送就无法撤回。

但是可以尝试以下方法间接删除已发送的消息：

1. 如果对方不在线，可以通过登录对方的QQ，把发送的信息从聊天记录中删除。

2. 如果对方在线并且已经看了消息，那么删除聊天记录的选项就无法使用了。

以上方法仅供参考，如果还有疑问，建议咨询QQ客服。

Dear [Buyer's Name],

I trust this message finds you well.

My name is [Your Name], and I am a professional foreign trade sales executive specializing in [product category], including [product names]. As a diligent and seasoned professional, I have dedicated myself to the craft of creating and executing impactful sales strategies that capitalize on the unique strengths of our products.

Today, I am writing to introduce our high-quality [product name] that is designed to exceed your expectations. Engineered with the latest technology and constructed from the finest materials, our [product name] is unlike any other on the market.

Our [product name] is not only [product's main feature/benefit 1], but also [product's additional feature/benefit 2], [product's additional feature/benefit 3], and so on. The result is a product that provides unparalleled performance, reliability, and longevity.

Here at [Your Company], we take pride in our commitment to excellence. We have an unwavering focus on quality and customer satisfaction, and it is this commitment that sets us apart from our competitors.

I would greatly appreciate the opportunity to share more about our [product name] and its ability to meet and exceed your specific needs. To schedule a meeting or to request additional information, please do not hesitate to contact me at your convenience.

Thank you for considering my message. I look forward to the possibility of working with you.

Best Regards,

[Your Name]

[Your Position]

[Your Contact Information]