Notification Letter to Registered Shareholders and Reply Form

The Current Corporate Communications of the Company have been published in English and Chinese languages and are available on the HKExnews website of The Stock Exchange of Hong Kong Limited (“HKEx”) at www.hkexnews.hk (the “HKExnews Website”) and the Company’s website at www.sinomab.com (the "Company Website”). If you have any difficulty in receiving or gaining access to the Current Corporate Comm