In the same wok where you cooked the chicken, add 1 tablespoon of sesame oil and cook the garlic until fragrant. Then, add soy sauce, chicken broth, hoisin, Shaoxing wine, and sugar. Mix everything together. In a separate bowl, combine 2 tablespoons of cornstarch with 2 tablespoons of cold water to make a cornstarch slurry. Slowly add the slurry to the sauce, mix well, and simmer for 2-3 minutes.