Hi friend,
To general high quality backlink, you have to focus on content of your backlink,
Do not spam backlink with poor content,
take my case as an example, i know SEO very late, but i don't care any way to build backlink, i just focus on quality of backlink. with every backlink, i never use any spinning method, i only write by manually.
After long time, my site rank was boosted dramatically without spamming backlink
Indeed, content of backlink plays an important role in boosting site rank.
Beside, i know for those who create nichesite to sell Amazon products, content of backlink is more important than normal.