Far from the city’s major Chinese enclaves, a couple left their Bronx apartment on Sunday headed to Chinatown for breakfast on a crisp fall morning. A few blocks to the D train. A short wait on the platform.

Then, without warning, the husband disappeared beneath the screeching downtown train, pushed to his death, apparently by a stranger, just before 8:45 a.m., the police said.

“Push, push!” his stricken wife screamed, according to witnesses, uttering one of the few English words she knew.

An assailant fled up the stairs and out onto the street.

Nothing was stolen, the police said, nor did the smattering of early Sunday straphangers describe a prolonged confrontation between the victim, Wai Kuen Kwok, 61, and his assailant.