In the Zhou Dynasty, the supreme god was called Emperor, God, Heaven and Emperor Heaven. God and heaven are the same name of the most high god, with different names.
On the fragments of Oracle Bone Inscriptions unearthed from Shang tombs, there have been records about gods and offering sacrifices to heaven. In the Yin and Shang Dynasties, offering sacrifices to heaven has become a huge ceremony, which lasted for more than 3,500 years.
Examples of recording God's content in Oracle Bone Inscriptions:
Oracle Bone Inscriptions unearthed from Yin Ruins in Anyang, Henan Province is the oldest mature Chinese character that people can see. Among them, there is the word "God". Oracle Bone Inscriptions was written by the Shang royal family on tortoise shells or animal bones for divination and recording. This means that "God" has existed in China's literature for over 0/000 years BC.
Hundreds of years later, in the Spring and Autumn Period, Shangshu and Shijing were edited into books, and there were a lot of records about "God" in the books. For example, Shangshu Tang Shi in Shangshu wrote about Shang Tang's crusade, saying, "I only heard that Xia was guilty, but I was afraid of God and didn't dare to be unjust." I'm listening to you guys' persuasion, but Xia Jie is guilty and I fear God, so how dare I not conquer Xia Jie?