The Sankengzi of Long Tan is located in the river rank of big fellow river ground, the big fellow river in the earlier period the shipping is prosperous of, the land-and-water becoming between the settlement(is like Long Tan, red bayberry, Kansai and Hsinpu) of inland and Ta-hsi transports a station, Sankengzi the old street consequently have the good reputation of"Long Tan first street". The Japanese occupation era, because big fellow river the gradual Yu is shallow, the route on land conveyance rises, the highway, railroad gradually replaces sea mail, and Sankengzi are tended to fall to have no.

Is greatly positive beginning year, the Japanese constructs ditch in Taoyuan and bring book engineering personnel for large numbers of days, the old street once resumed the prospects of busy jollification. At present of three pit old street up, can also see fade in color of old placard up, write Japanese of"plum flower beer"Certain context.After waterway and culvert engineering of ditch in Taoyuan complete work, after engineering personnel leaves, three pit old streets of prosperous also follow to leave again.
    From now on, Sankengzi sons become a desolate small small village and seem to Sleeping Beauty of the years congelation, the old street shape before a hundred years leaves behind up to now.
    In recent years, because the government promotes the cause of carbon in the economy energy province, Sankengzi regions take a bicycle unrest, with Sankengzi bicycle way the favor that once more again is kept in mind an old visitor, day off time, often can see a far way and come of the visitor arrive at Sankengzi old street tour.