How to distinguish purebred golden retriever puppies

Usually, you can identify whether a golden retriever puppy is purebred by looking at three aspects: the head, fur, and body size.

Observing the head: Purebred golden retrievers have a relatively flat head and a long face. Their ears are tightly attached to the sides of their heads, forming a triangle that just covers the inner edge of their eyes.
Observing the fur: Purebred golden retrievers have fluffy fur, which is golden and red-brown in color.
Observing the body: Purebred golden retriever puppies have thicker limbs, thicker paws, and higher intelligence than non-purebred puppies. They are more obedient and easier to train.
Head observation:

From the head, purebred golden retrievers have a relatively flat head and a long face. Their eyes are almond-shaped, with medium size, and their pupils are black or brown. Their ears are large, triangular, and hang naturally on both sides of their heads. The distance between their ears is relatively wide.

Fur observation:

The fur color of purebred golden retrievers varies from light to dark golden and red-brown. The fur is longer, especially on the abdomen, and is soft and shiny. The tail fur spreads fan-like after the dog reaches adulthood.

Body observation:

Purebred golden retrievers have stronger and thicker limbs, thicker paws, a thick chest, and a horizontal back. Golden retrievers with a too thin body size are considered unqualified.