In Georgia of all places, on the East Coast of the USA far from the hypothetical Chinese fusang colony, a sword believed to be of ancient Chinese origin was found. The sword is about 30 centimeters, which is just shy of a foot long.
The sword / dagger was examined by the University of Georgia and determined to be made of Lizardite, which is very similar to Jade, in fact it is sometimes referred to as "New Jade".
Jade was, and still is very common in east Asian artistry, particularly Chinese. The swords surface features indicate that it is extremely old.
An attempt to ascertain when the soil at the extraction site was last exposed to sunlight was thwarted because it was determined the soil had been disturbed after the object had been placed there. There does however remain a small fragment of a stranded material, perhaps the remnants of a sheath that was still attached and may be suitable for radiocarbon dating.
Symbols and artistry that adorn the sword were common in the Xia (2070-1600 BC), Shang (1600-1046 BC) and Zhou Dynasty (1046-256 BC).
The Indigenous Peoples Research Foundation made the following Analysis of the sword
"Preliminary opinions on the form and motifs have been identified as first appearing in the Chengdu plain of the Sichuan basin in Southwestern China. The distinctive eye cartouches and pronounced eyes ...faces on the cross guard and those on ... the handle, are stylistic duplicates of those first appearing with the Sanxingdui culture (1750-1200 BCE). This eye motif along with diagnostic Sanxingdui "wing" shaped eyebrows can also be seen on a face appearing on another piece also found at Location 1. These motifs persisted in successive cultures making culture specific identification difficult... The similarities of Olmec art and other cultural attributes to ancient China has long been a subject of scholarly debate."
There is also the possibility that the sword may be Olmec in origin.
The similarity of Chinese-Olmec symbolism as well as mythology has been noted. See - A Sea link between Olmecs and Shang Chinese
The Olmec culture is a sort of an enigma to archeaology and anthropology as they bore elements of African  as well as east asian culture . The olmecs first appeared in central america around 1500BC at the start of the Shang dynasty in China, which coincides with the early phases of the bronze age in the west.
Jade in this era was worth more than gold in China, jade was also found in abundance in Olmec controlled areas. Perhaps the Chinese had contact with the Olmec while in search of Jade similar to Spain's contact with native Americans in search of gold. That the sword found in Georgia came from an Olmec expedition is much more feasible than assuming that Chinese traversed the entire North American Continent and dropped the artifact in Georgia.
Figurative works in jade were being made by 1000 B.C. by the Olmec peoples of the Mexican Gulf Coast. Professionally excavated in important burials and caches.