A friend of my just told me you can enter china without no visa

Evans, I think your friend must be talking about the 24 or 72 hour free transit policy. It is true that if you hold in and out tickets and valid passport, you can enjoy 24 hour/72 hour free transit (only available to certain countries). As you hold Ghananian passport, you can only make use of the 24 hour free transfer policy. If you want to stay longer, the entry permit is still needed.