The main principle of minimally invasive techniques in orthopedics is to implant a specific bony plate, which is fixed across a transverse fracture, via small incisions of the periosteum, skin, and muscle. These implantation devices include less invasive stabilization systems, dynamic compression plate systems, and LCP systems. Internal fixation with the LCP system involves two completely different fixation techniques and two opposing osteosynthesis principles, namely conventional plate and bridging plate osteosyntheses characterized by direct anatomical reduction. Because of its special design, the LCP can be used as a dynamic compression plate, as a pure internal fixator using locking head screws, or as both combined, thus providing a variety of therapeutic options for surgeons. Moreover, the LCP has good stability and induces less damage to the periosteum; it is therefore beneficial for bone healing and functional recovery. Given these characteristics, the LCP is likely to have stronger stability than the conventional locking plate for internal fixation of fractures. Therefore, the investigators design a study protocol that compares the LCP and conventional locking plate using minimally invasive techniques for internal fixation of proximal humerus fractures in older patients. The investigators hypothesize that the LCP will be more effective than the conventional locking plate in promoting shoulder function recovery with a higher excellent rate according to the Neer classification system for proximal humerus fractures.