do i need a visa to travel in china of few location at Shenzhen ,Hongkong, macao, zhuhai?

I'm citizen of Malaysian holding Malaysia passport and currently working at brunei,wish to know further information weather need to apply visa for visiting China as mention above,

Travel period at Mid of December this year 2011 till on 2nd January- around 8-10 day travelling. do i need to apply for visa within this travel period and what the term and condition?


if the condition that we don need to apply a visa visiting china then will there be a problem entering china custom when they ask alot question which we not familiar .