is an International to International change of planes in T3 of Beijing listed as an entry date on the Visa

I am flying JFK-SIN through PE$K on Air China. Then flying back from SIN to SHA and then on to PEK for a visit. I will have a double entry Visa, but must I use up one of the entries with the 75-minute plane change in T3 at PEK? The Visa form asks for a date of entry. Is that date the date of the plane change or the date of entry coming back when I will be visiting for about 10 days?