The "Watermelon Popsicle" that went viral on Internet
Of course if that all that fails, you could always, knock and wait for a reply.
The BBC article also mentioned that there is a fragment of knocking watermelon in the Russian cartoon "Ну, погоди!!" which was quite the rage. In fact, knocking watermelon is a common phenomenon. Not only Chinese people, but people all over the world have the habit of knocking watermelon to hear echoes.
However, we are absolutely unique for eating watermelon in so creative way. The "Watermelon Popsicle" that went viral on Internet
According to the Food and Agriculture Organization of the United Nations (FAO), China produced 79,269,592 tons of watermelon in 2016, imported 234,724 tons and exported30,968 tons. The per capita consumption was over 50 kilograms in 2016.
For a long time, the Chinese people’s love for watermelon has left a deep impression on foreign friends. As soon as the news came out, a more heated discussion sparked on "Quora" :