Great Happiness on Chula Vista's Third Avenue serves a Cantonese-American Chinese menu from a counter-service format at the southern end of the Third Avenue commercial strip in the Otay district. The combo-plate system pairs two or three entrees — orange chicken, kung pao shrimp, beef with broccoli, or sweet-and-sour pork — with steamed rice or chow mein, a format that runs alongside the marine proteins at T & M Seafood in the broader South Bay dining scene. Fried rice plates, egg rolls, and the signature salt-and-pepper chicken wings round out a menu built on wok-fired technique rather than steam-table holding. The Chinese food Chula Vista search category drives steady demand to this stretch of Third Avenue, where Great Happiness shares the corridor with the Neapolitan-style pies at Giant Pizza King. The orange chicken dredges boneless thigh meat in a cornstarch batter, flash-fries at 375 °F, and tosses in a house glaze of orange zest, soy, rice vinegar, and chili flake for a sweet-heat finish.