Chained: Two-year-old Chen Chuanliu is regularly padlocked to a tree while his rickshaw driver father touts for customers in Beijing No escape: The padlock securing the toddler At first sight it seems the ultimate in child cruelty – a two-year-old boy chained to a lamp post to stop him getting away. Yet his parents say this is the only way they can guarantee not to lose him. His father Chen Chuanliu...