Bring a saucepan of salted water to a boil. Blanch the pear wedges and carrots for 30 seconds, then drain immediately. Pat the shrimp very dry. In a small bowl, mix together the salt, sugar, chicken broth and cornstarch. Set aside.
Heat a wok or large saute pan over medium-high heat. Add in the cooking oil and swirl to coat. When the oil is shimmering, add the shrimp and stir fry for 1 minute. Add the grated ginger and continue stir frying for 30 seconds. Add the peas, carrots and pears and toss well. Stir fry for 1 minute. The shrimp should be just barely cooked through.
Pour in the chicken broth mixture, stir and let cook for an additional minute, until shrimp is cooked through. Serve immediately.