Yang, a medical clerk in Wuhan, Hubei province, was surprised to receive a call last November telling him that his wife, who had died in a car accident two months before, had left a "digital will".

"I was shocked. They sent me an account number and password to log in to their website, and I found my wife had left me the bank account, the account number and password for our online store, and some words for me," said Yang, who asked not to be fully named.

"I feel grateful to this website, as it helped me to know my wife better, and saved me lots of trouble," he said.