This sentence means that although we have to say goodbye or goodbye at present, we still hope to have the opportunity to meet or meet again in the future. Expressed an open attitude and did not rule out the possible intersection or farewell in the future.
"Goodbye by fate" is usually used in parting, and it can be used in various occasions, such as the parting between friends, the end of working relationship, and the separation of people met during the trip. It conveys a feeling of friendship, warmth and hope, expresses blessings to each other, and reserves the possibility of meeting again in the future.