Trains and Planes

Hi.

Can I make use of the 24 Hours visa free permit if I land in Beijing and then take the train from Beijing to Russia? Although I will have a booked train and seat to leave Beijing within 24 hours of landing in China, I won't technically leave the country well after 24 hours.

Arrive Beijing 0850 Saturday by Air.
Leave Beijing 2300 Saturday by Train.
Leave China 0417 Monday (same train)

Any help appreciated