Could the article be more natural? Nowadays, some museums charge entrance fees, while others are free. Although we often say that arts are priceless, certain amount of money should be charged from tourists and citizens. With the admission fee, museums can maintain their daily operation, including fixing broken machines, polishing the paintings and sculptures and paying the employees. In other words, museums can offer better services with the money. They can build facilities which enable children to experience, build customer service centres which offer guided tours and personal services. Moreover, museums need to invest in modern technologies if they want to present the arts better. To some extent, this repay the money back to the customer. We all know, pieces of arts in the museums represent a nation's history and value. They should be protected cautiously as some of them are very fragile. If the museums are opened free, it may be crowd as tourists and citizens flood in . They may take photos and make noises, which can cause damages.In my country , some famous museum like Gugong Museum charge entrance fees ,as well as limit the number of everyday visiting people, they even have guardians take visitors' cellphone to prevent them photograph. I think it is reasonable to do that, because if we want to show these wonderful pieces to the next generation ,we should have take good care of them. Of course, Free entry has its advantage. People can get close to a nation's culture and histoury remains. They can learn the knowledge for free. Overall, I believe a certain amount of money that people are affordable should be charged when visiting a museum. It is good for the development of museums.