where are the flowers? This should be a fruit-bearing spindle-tree (Euonymus sp.). I am not sure about the species, however.
Agree with Euonymus. Possibly Euonymus grandiflorus. What you have photographed are not flowers but the fruit/seed.
I know they are the seeds. It flowered a month ago. I only saw it today for the first time. I've never seen the flowers.