It’s been said you don’t really know someone until you’ve traveled with them. I never understood just how true that was until I witnessed my 75-year-old grandmother in action, tossing a hefty fishing net into the currents of Vietnam. We were cruising through Cua Dai, a remote fishing village near Hoi An , on our very first getaway without the rest of the family. What began as a sightseeing boat tour turned into a trip down memory lane as soon as she spotted a cluster of bamboo water wheels and netting along the horizon. They looked nearly identical to the equipment she used as a little girl in a fishing hamlet in China’s Guangdong province. Walking around Hoi An's old town. Venus Wong “I haven’t seen these since I left my village at 13 for a better life,” she told me, her eyes gleaming with excitement. Before I knew it, she’d hoisted herself onto the wooden platform, expertly turning the wheel with her bare feet to lower the nets into the water.…