Chinese calligraphy: What is the Jianghu? HD Phone Wallpaper

The image features bold, white Chinese calligraphy on a black background. The main characters read '人就是江湖' (Ren Jiu Shi Jianghu), which translates to 'People are the Jianghu'. To the left, smaller text in a blue box reads '江湖非易事' (Jianghu Fei Yi Shi), meaning 'The Jianghu is not easy'.