为一个新产品写一份描述性的商业广告。
我们的新产品是一款轻便耐用的折叠自行车，适合城市骑行和旅游活动。
Introducing our new product - a compact and sturdy folding bicycle perfect for city commuting and outdoor adventures. Its portability makes it easy to take anywhere, while its durability ensures it will last for years to come. Say goodbye to long walks and hello to the freedom of cycling with our new folding bike.