The Xiaomi Mi 5 has a lot going for it. A Snapdragon 820 SoC, up to 4GB of RAM and an impressive 16MP camera with a 4-axis OIS system, to name a few. But the handset is also dressed to impress in the flagship circles it intends to mingle with, especially in its top-tier ceramic back variant. This material choice is definitely not unheard of, take the OnePlus X for instance, but it still seems to raise some flags with many users, who seem to typically associate ceramic with a brittle dinner plate or perhaps a vase. In an effort to address this, Xiaomi has released a stress test...
Source: http://www.gsmarena.com/watch_the_ceramic_back_of_the_xiaomi_mi_5_take_a_lot_of_abuse_in_this_official_stress_test-news-17516.php