Boil chicken with little salt, boil till it done
Heat oil n deep fry long green beans in heated oil when it get soft transfer it to a plate.
Now in same oil fry boiled chicken pieces n takeout in plate.
Take another wok heat 1 tablespoons oil. Add ginger garlic n saute for 30seconds on high flame.
Add onion, boiled and fried chicken, fried long green beans saute for minute.
Add soy sauce, vinegar, salt n sugar n mix it well n cook on high flame for minute.
You r done. Serve this hot in plate.