Wu Long finally finished the first version of his technique's bloodline manipulation part.
He almost ran out of useful blood samples from Demonic Beasts, their bloodlines he used to make this progress waning in power and assimilating into his own while he purified any impurities from it.
In creating his body tempering technique he took inspiration from Lian Zhiqiu's Formation which had a central core and building blocks that could be added, replaced after being improved, and discarded in case they no longer were effective.
And though it was easier said than done when it came to a body tempering technique rather than a formation with literal 'blocks', it did not take him long, even though it was certainly something he put a lot of his mind into creating.
Bloodline manipulation was only one of those building blocks, and there were several other parts, such as the Yang Root and Yang Qi strengthening or Dao Rune integration.