Wah Yan College (Kowloon) Scouts Jamboree/Rally 1957/58

I wonder if anyone can help with any information relating  to a major Scouting event held in the football ground of Wah Yan College (Kowloon) in either 1957 or 1958.

At the time I was a just a greenhorn Cub scout of age about 9 or 10 from a Government primary school,  and I think we were taken along  just to make up the numbers.  After about 20 minutes walking/marching  from the Yaumati  train station, we got onto a football field and we settled ourselves near a sand pit at one end of an athletics track made for long-jump.  Hundreds of other Scout troops from all over HK had also been arriving.  The rally culminated in a grand inspection by some high ranking official. I did not know at the time that the grassy football ground that we were on was part of Wah Yan College.  It was quite a long time afterwards that I’d figure out by backreferencing  that it was indeed the football ground of my secondary school.  This was because I’d remembered the sand-pit area and the refectory across the football field where we could buy refreshments.