Sauroposeidon
The press release in 1999 immediately garnered international media attention, which led to many (inaccurate) news reports of "the largest dinosaur ever!". While "Sauroposeidon" likely represents the tallest known dinosaur taxon, it does not hold records for either the longest or most massive. "Patagotitan" or "Argentinosaurus" make better candidates for the title "World's Largest Dinosaur" (presuming to ignore, as is conventional, "Amphicoelias"), though incomplete fossil evidence makes exact rankings impossible.
Changyuraptor
The Jehol Biota are found in the richest fossil beds for feathered dinosaurs in the world which have yielded notable species such as "Yutyrannus huali", a feathered tyrannosauroid with a length of and the largest feathered dinosaur known to date.