I have never eaten it, but according to the answers from netizens, it should be "Qiaqia melon seeds".

@天人水利强qiaqia melon seeds are available in the United States for US$1.99, buy a box! Converted into RMB, that is RMB 12.4 per box. There are 18 bags in a box, which is 6 cents and 8 cents per bag. In Chinese supermarkets, a bag like this costs 6.9 yuan. In other words, the Cha Cha melon seeds in American supermarkets are 10 times more expensive than those in China. Americans earn 10 times the wages of Chinese people, but buy products at one-tenth the price. The consumption level is 100 times different!