Grass-planting copywriting on Xiaohongshu.

Please write a small copy about the hot brand, model x_back, of a heated blanket on Xiaohongshu. Highlight the usage scenarios including cold feet, cold legs, and cold sleep, conveying the feeling of being surrounded by a fireplace. Emphasize the original price of 399 yuan, with a special winter clearance price of 199 yuan. The promotion lasts for three days, first come first served, and the first one hundred buyers can also receive an additional 10 yuan coupon. The heated blanket has waterproof and leak-proof, automatic temperature control, and anti-scald functions.