Grandpa has passed away, how to transfer the house property right directly to the grandson's name?

Now we need to skip the children and go straight to the grandson's name. What legal procedures are needed, such as writing a power of attorney, justice? As lawyer Zhang Yi said, if the first heir gives up property rights fairly, can he be regarded as the second heir as a child? If so, does the second heir have the right to apply for inheritance of property rights while the first heir gives up the property rights? If it doesn't count, the first heir (that is, grandma) voluntarily gives up the inheritance right fairly. Can the grandson inherit it? The purpose of turning to experts now is that grandparents don't want to pass it on directly to their grandchildren through their children ~ I want to ask what can be done ~