笔冢研穿

Explanation: Bald pen into the grave, ink grinding perforation. Writing skill that works deep. 　　Source: Mingling 濛 first "<half an hour to stand up surprise> Foreword": "lack of support for the sauce that made Slang BU, and Yifei shin go, vomiting pen mound than twist Research mustache wearer, the sale of anti-Xiao soil compartment not sell too. "