Junshi Biosciences' stock soared 5.04% during Tuesday's morning trading session following news of increased insider confidence in the company.

The surge came after the company's chairman, Xiong Jun, raised his shareholding by purchasing additional shares worth 12.2 million yuan. According to a filing, this transaction is part of a broader plan to increase his stake by 50 million to 100 million yuan, with the share acquisition process still ongoing.

Such insider buying activity is often interpreted by the market as a strong vote of confidence in the company's future prospects, which appears to have driven investor sentiment and contributed to the significant price movement.