This study is A multicenter, randomized, double-blind, placebo-controlled phase 2 clinical study to evaluate the efficacy and safety of HT-101 injection combined with HT-102 injection in patients with chronic hepatitis B. It consists of two phases: the main trial and the extension period. The main trial phase aims to explore the efficacy of different courses of HT-101 injection combined with HT-102 injection in treating patients with chronic hepatitis B and evaluate the optimal treatment strategy. The extension period phase, based on the main trial, assesses the long-term safety and efficacy of HT-101 injection combined with HT-102 injection.