帮mandy用英文给Christian Langstrand写一份信。简单问候再告知他有个好消息。秋季大促店铺商品均半折优惠。更新了一批新产品包括秋季连衣裙流行包包礼服等。均是现货数量有限先到先得。活动时间为2025-08-15到8月17日。店铺链接为http：wwwaliexpresscomstore1821815。还有三款精选手机包完美搭配连衣裙

Dear Christian Langstrand,

I hope this letter finds you well. I just wanted to reach out and say hello. I have some exciting news to share with you. Our store is having a big promotion this autumn, and all of our products are 50% off. We have also added some new items to our inventory, including autumn dresses, trendy handbags, and formal wear. All of these items are in stock, but quantities are limited, so it's first come, first served. The promotion will run from August 15th to August 17th, and our store link is http://www.aliexpress.com/store/1821815.

I would also like to mention that we have three selected phone cases that pair perfectly with our autumn dresses. I hope you'll take advantage of this promotion and find something you love.

Best regards,

Mandy