As an ordinary person, I guess there are several possibilities:

1, poor operation

Lanzhou Ramen Restaurant, as a very common noodle shop, the competitive pressure in the market is not small. If the previous owner is not good at running the noodle shop, there is a continuous loss, its owner is not optimistic about the future of the noodle shop, in order to avoid their own interests continue to be damaged, so the noodle shop will be transferred to others. In this way, a new owner takes over the noodle shop.

2, multi-people cooperation

Maybe the Lanzhou ramen restaurant itself is a few people work together and open, because of some reason or agreement, the bosses do not appear at the same time. That's why it seems to the guests that a boss will appear every once in a while.

3, the store to do big upgrades

If Lanzhou ramen restaurant profit has been very good, and the customer base is stable. Then there is a possibility that the boss in the noodle shop operation on track and believe that the noodle shop prospect is very good, entrusted someone to the management of the ramen shop, its decentralization and retired. This will also give guests the illusion that the restaurant has changed owners.

It is also possible that because the noodle shop is doing so well, the owner is busy opening branches elsewhere and the store has to be managed by someone else.