For marriages, funerals, birthdays and illness, send a gift. But choosing a gift is an art in itself, and you can wrack your brains and spend a whole day shopping, and you still won't know if the other person will like it or need it.
婚喪喜病，送禮嘛，挑選禮物就是個大學問，花了半天腦筋，費了竟日功夫，買的東西也不知對方喜不喜歡，需不需要？