Two locomotives, "Jupiter" owned by Central Pacific Railroad and "No. 119" of Union Pacific, meet to recreate the scene 150 years ago in celebration of the 150th anniversary of the completion of the first U.S. transcontinental railroad at the Golden Spike National Historical Park at Promontory Summit, the United States, May 10, 2019. (Xinhua/Li Ying)

NEW YORK, May 25 (Xinhua) -- Grace Meng, a member of the U.S. House of Representatives, will host an unveiling ceremony on Wednesday for new postage stamps commemorating the 150th anniversary of America's Transcontinental Railroad, and the contributions that Chinese immigrant laborers made in building it.

Meng will be joined by officials from the U.S. Postal Service and the Museum of Chinese in America (MOCA) at the event scheduled at 1 p.m on May 29 in New York's Chinatown.

This month marks the 150th anniversary of the railroad's completion. A total of three Transcontinental Railroad Forever Stamps will be unveiled during the ceremony.

Between 1865-1869, approximately 12,000 Chinese laborers worked under extremely dangerous and challenging conditions to help construct the railroad, which connected the United States from coast-to-coast.

The workers, who endured discrimination, harsh treatment and unequal pay, are credited with playing an integral role in the growth of America and being an important part of U.S. history.

The Transcontinental Railroad has long been considered one of the most remarkable engineering feats of the 19th century. It reduced cross-country travel time from six months to a single week.

In Congress, Meng has worked to recognize and honor the sacrifices that the Chinese railroad workers had made in constructing the railroad.