* Including 6 SGY alumni who are also CUS-PhD-EA alumni; excluding 2 CUSPEA and 1 CGP alumni who registered for the meetings but did not attend.

** Including 2 SGY alumni who did not register but attended the Hefei meeting; excluding 3 CUSPEA and 3 CUSBEA alumni who are also SGY alumni, and 13 SGY alumni who registered for the meetings but did not attend.

*** Including 2 non-alumni participants who did not register but attended the Hangzhou meeting, and 8 participants who did not register but attended the Hefei meeting.

**** Including 3 SGY alumni who are also CUS-PhD-EA alumni, and 2 CUSPEA alumni did not register but attended the June 30th event; excluding 13 CUSPEA, 2 CUSBEA, 1 CGP and 2 MATH alumni who registered for the June 30th event but did not attend.

***** Including 21 SGY students who did not register for the meetings but attended the June 30th event; excluding 3 CUSPEA alumni who are also SGY alumni, and 7 SGY alumni who registered for the June 30th event but did not attend.

****** Including 2 non-alumni participants did not register for the June 30th event but attended.

******* Including 5 SGY alumni who are also CUS-PhD-EA alumni.

******** Excluding 3 CUSPEA and 2 CUSBEA alumni who are also SGY alumni.

********* The unregistered attendees mainly include Zhejiang University alumni speakers and special invited opening speakers or forum participants.

Generally, invitees are not alumni; they mainly include guests who will deliver the meeting opening remarks, a few invited speakers on special related topics, and participants in the meeting-end forums.

Overall, of the 34 SGY alumni almost half (13) are from the initial SGY class or representatives of the initial SGY class who entered USTC in 1978, apparently because this class is the only alumni group to self-organize and recruit attendees.