The board of directors of Yongsheng Advanced Materials Company Limited announced that Ms. Lo Lok Ting Teresa has tendered her resignation as the company secretary of the Company with effect from 31 May 2019 due to her other commitments. The Board also announced that Ms. Yeung Wing Kwan has been appointed as the company secretary of the Company in replacement of Ms. Lo with effect from 31 May 2019. Ms. Yeung is an associate member of The Institute of Chartered Secretaries and Administrators in the United Kingdom and The Hong Kong Institute of Chartered Secretaries. She has over 10 years of company secretarial experience in listed companies in Hong Kong. Ms. Yeung was the company secretary of China Daye Non-Ferrous Metals Mining Limited, a company listed on the Main Board of the Stock Exchange, from September 2012 to August 2015.