How to evaluate the camera performance of Huawei P9?

Leica is a German brand with a history of one hundred years. The photos taken have a unique "German flavor" and are the favorite of many celebrities, professional photographers and war correspondents. Many classic photos are from Leica. Leica's unique color effect is the lifelong pursuit of professional photographers, while P9 is a dual camera phone with Leica color mode. P9 can not only shoot the SLR-level background blur effect, but also adjust the blur degree. The photos taken by P9' s Leica dual camera are excellent in all kinds of environments.