Finnish citizen travelling from Helsinki to Malesia via Chongqing and Guangzhou

Hello! I am travelling from Helsinki to Malesia (Kuala Lumpur) by flying from Finland to Chongqing, from Chongqing to Guangzhou and finally from Guangzhou to Malesia. In this case, I will not be staying in China for more than 24 hours.

When I am coming back, I am flying from Malesia to Guangzhou, then from Guangzhou to Chongqing and have to stay in a hotel in Chongqing overnight. In the next morning, I am flying from Chonging to Finland. In this case too, I will not be staying in China for more than 24 hours.

Do I need a Visa or not? Both Chongqing and Guangzhou should be 72 hours free cities.