 Countless, mostly small family run manufacturers have over the centuries preserved their ethic ideas by producing highly sophisticated goods, built temples and dedicated ceremonies and festivals in an unbroken culture of veneration for these legendary popular spirits.However, according to researcher Lê Minh Khải, despite all the evidence the folk about Hồng Bàng period and the Văn Lang kingdom are not real, they were created by sinicized Confucianist scholars around 1400 AD to make Vietnamese some distinctions to the Chinese.After new wave of nationalism revolutions in 20th century, these folks and stories had been solidified in modern Vietnamese history book.