Last time, the faceless men's attack on the Thousand Star City was destined to fail. The number of Venerables that appeared last time was far less than the number of Venerables that appeared in the war on the Scattered Stars Island.
This meant that there were still Venerables hiding in this huge city. As for their purpose, it was unknown.
One of the Venerables of the Zhang family had already died, and Zhang Zhihuo appeared afterwards. He was only a junior peak-level Venerable and wasn't very strong. The person who could challenge Old Han and the others back then must be a high-level Venerable of the Zhang family.
In other words, the Zhang family had at least three Venerables before, and now they had at least two.
This was a big clan that had existed for thousands of years. The family was very wealthy, and there were many children in the clan, so there would always be Heavenly Talents born.