The reason why Zhou Wenqiang is called "Henan's most charitable person" is that he made a significant contribution to the flood disaster in Henan.

After the floods in Henan, he immediately established a rescue command team and raised nearly 2 million yuan in donations through the Beijing Shihua Charity Foundation to actively support the disaster areas.

In addition, he has also actively participated in and promoted various charity activities in other public welfare fields and made positive contributions to society.

Therefore, he is considered to be the person who has made the greatest contribution in the field of public welfare in Henan, and is known as "the most charitable person in Henan".