Jessica Wang stands outside Gu Grocery, the storefront she’s struggling to open in Chinatown. (Jason Armond / Los Angeles Times)If all goes according to plan, Gu Grocery will help close a deepening food scarcity gap in Chinatown. Like Yue Wa, Gu Grocery will operate as a small corner store rather than a full-service grocery. Two years into its five-year lease, Gu Grocery is struggling to open. Jessica Wang and her parents Peggy and Willie Wang greet Chinatown residents outside of their storefront Gu Grocery.