An Australian journalist detained in China for three years on espionage charges said in a letter dictated to a diplomat in Beijing that she misses walks in nature and especially her children.“I miss the sweet encounters of wildlife in Australia, the seasalt whirling in my ear, the sand between my toes,” said Cheng Lei, a former anchor for Chinese state media who was tried on national security offenses at a closed-door hearing last year.“I miss the sun. In my cell, the sunlight shines through the window but I...