Mr.nur, Malaysian passport holders are exempt from a visa to Hong Kong for up to 90 days, but you need a visa to Shenzhen, you can apply for a special Shenzhen visa on arrival which permits you stay in Shenzhen for less than 5 days. You can't use this special visa to visit other places.

Sir im working here in hongkong now i want to visit my mother in malaysia what im going to do do i need to get visa or invitation letter or just the tiket only tnx