Wei Lin is a luduan, a Chinese auspicious creature who gifts good rulers with books of wisdom, and can detect truth or falsehood. They look like a green deer with a horse tail and one horn.
Wei Lin mentions boarding a Song Dynasty ship heading to the Americas in 1419. That year was during the Ming Dynasty, but a 150 year old Song ship could still have existed. Oh, the term 'junk ship' doesn't refer to the quality of the ship or its cargo. The Song dynasty junks, with fully battened sails and stern mounted rudders, were the best long range sailing ships of their time.
Wei Lin mentions a time "with the eyes of the entire Terracotta Army" upon them. For perspective, the over 8000 terracotta soldiers and thousands of ancillary figures were burried more than 2,200 years ago.
The satchel of gold to pay Teague contains two bars of gold. Although lacking the normal identifying marks, they are almost certainly 400 Troy Ounce Good Delivery gold bullion bars. That totals over 50 pounds weight and well over $1,000,000.