Online arrival card when travelling from Hong Kong into Shenzhen/Guangzhou
I am from Singapore, which exempts me from needing a visa to travel to China. I will be taking the HSR from Hong Kong to Shenzhen and Guangzhou, and I've seen the blue arrival card that people fill out at the HK station before clearing immigration. Can I ask if I can just fill in the online version here? Is it compulsory to do the physical card?