suī / rán / lǐ / wù / bù / guì / dàn / lǐ / qīng / qíng / yì / zhòng / wǒ / fēi / cháng / gǎn / xiè / nǐ / de / xīn / yì

虽然礼物不贵，但礼轻情意重，我非常感谢你的心意。

Although the gift is not expensive, the thought behind it means a lot, and I truly appreciate it.