"You haven't heard of Ancient Sage Qiu Wu's Heavenly Demon Great Sorrow Palm? Back then, unable to pay his final respects to his deceased mother due to compelling circumstances, Ancient Sage Qiu Wu created this technique out of deep sorrow. Due to the concept behind the technique, the Heavenly Demon Great Sorrow Palm is one of the few physical battle techniques that is able to faze a cultivator's soul! Legend has it that one of its moves consists of a palm art descending from the heavens," Zhang Jiuxiao quickly explained as he stared at the sight before him with the utmost shock.
As an offspring of the Zhang Clan, while the lacking purity of his bloodline made him unqualified to access the best cultivation resources within the clan, the experiences and relics that he had come into contact with in the Zhang Clan still granted him knowledge and an eye of discernment far superior to the master teachers of the Qingyuan Conferred Empire.
Just some background information:
Qiu Wu is a real figure in the Spring and Autumn Period (771 BC to 476 BC), and he is known for his filial piety. Just to give a brief summary of the encounter between Kong Zi and Qiu Wu: Kong Zi was walking by the streets when he suddenly hears sorrowful cries. Perplexed, he heads over to investigate the matter when he encounters Qiu Wu. When he inquires Qiu Wu the reason behind his sorrow, these are the words that Qiu Wu returns to him: A tree desires the calm but the wind batters relentlessly, a child seeks to repay but his parents wait not!