is Visa Required for Return Cremation Ashes to China Family by Australian Citizen

Hello - I need to take Chinese Family Cremation Ashes of my late wife - I am Husband with Australian Passport - I will stay with late wife family 3 days in Guangdong and need to complete claim documnets at Bank of China in Gungdong - please advise this issue - Is it advisable to Enter from Hong Kong with VOA or Apply one and get direct plane to Shenzhen