JD.com. Genuine official Big Head Cero cards can be purchased at the JD.com Ultraman official flagship store. They are still available for purchase as of August 18, 2022. A single souvenir Big Head Cero card is priced at 199 yuan. Ultraman Zero is an Ultra warrior who appears in Japan's Tsuburaya tokusatsu drama "Ultraman" series. He is known as "Sai Shao" by the Chinese because of his unruly and popular personality.