Gift giving in China is different from the West in that physical gifts are not usually given for birthdays, weddings or Spring Festival. Greeting cards are rarely used in China and hard to come by, so a Chinese person wouldn’t expect a card along with a gift.

Don’t expect a thank you card for these gifts in China. Clocks, handkerchiefs, straw sandals and flowers are all associated with death and funerals in China. Deemed inappropriate and morbid, you’ll risk damaging the relationship if you present these gifts for any occasion to someone in China.

Source: http://www.readersdigest.ca/travel/travel-tips/13-unusual-international-customs-you-never-knew-existed/3/, https://www.yoyochinese.com/blog/learn-mandarin-chinese-gift-giving-etiquette-in-china