At present, there is no explicit provision in laws and regulations to intervene in this matter. It is generally understood that this is a problem of "one willing to fight and one willing to suffer" in business activities. It can only be decided by the transferor and the successor themselves: whether to pay the transfer fee or not, and how much to pay it.
The correct way is to invite the store to negotiate with the three parties. There are some skills in negotiation. After the matter is agreed, don't forget to sign a written transfer agreement with the other party and sign a new store lease contract with the owner (also pay attention to inquiring and supervising the store lease license and transfer procedures to be handled by the owner).
Baidu Encyclopedia's explanation of the store transfer fee: the store transfer fee refers to the lessee subletting the house with the consent of the landlord during the store lease period (unexpired), and transferring the remaining lease period together with the landlord, together with the lessee's decoration, the original purchased equipment, business items (goods, franchise license fees, other intangible assets), etc. To the next tenant, the fee charged by the next tenant that exceeds the rent payable is the transfer fee.
If the house is not renovated (or the renovation cost is not borne by the tenant), there is no equipment (the equipment originally purchased by the tenant), or there is no business project (meaning that the tenant has not left any business project), there will generally be no transfer fee. However, if new tenants are eager to find a store, they may be willing to pay more than the rent, which is also the store transfer fee.