24 hours. The working hours of Jiaozuo 12345 customer service are 24-hour, and it is answered by specialized staff from 9: 11 am to 5: 11 pm from Monday to Friday, and the rest of the time is voice messages. Jiaozuo, formerly known as Shanyang and Huaizhou, is a prefecture-level city in Henan Province. Jiaozuo is located in central China, northwest Henan, Taihang Mountain in the north, Jincheng in Shanxi, and the Yellow River in the south across the river from Zhengzhou and Luoyang.