My suggestion to you is, first, choose appropriate gifts according to the type of customers, such as high-end Chinese handicrafts for foreign companies.
Second, give customers practical and unique gifts, such as customizing a high-end leather bag for customers, and then write your company name and words of blessing to customers on the inside of the bag.
Third, you can choose popular gifts, such as good tea. Tea is loved by Chinese, foreigners, adults, the elderly, and children. Even if the customer himself does not drink it, his family will definitely drink it.
Fourth, give customers a more practical gift, haha, yes, it is a red envelope. After all, businessmen are all for livelihood and money, so giving money is the best.