Frozen food is a kind of food stored in -12 ~ -23 degrees Celsius, including seafood, aquatic products, chicken vice class, duck vice class, goose vice class, pig, cattle, sheep, agricultural products, pills and pastries, other meats, other agricultural products, such as a large number of meat or non-meat food.

Frozen products with nutrition, convenience, health and economic characteristics, is a new type of processed food developed in the 50s and 60s. It developed rapidly in the 70's, popularized in the world in the 80's, and became the most rapidly developing food industry. By the 90's, the production and sales of frozen convenience food in some developed countries such as the United States has accounted for more than 50% of all food, gradually replacing the primary position of canned food.

In the evening of March 11, 2020, Pinduoduo (NASDAQ:PDD) released the company's unaudited financial results for the Q4 and full year ended December 31, 2019 before the market. The financial report showed that for the full year of 2019, it realized revenue of 30.14 billion yuan, up 130% year-on-year from the previous year; under non-general accounting principles (NON-GAAP), the platform's Q4 operating loss was 1.34 billion yuan, compared with 2.11 billion yuan in the same period of the previous year, and 2.12 billion yuan compared with Q3, which was sharply narrowed year-on-year and year-on-year. In terms of user data, as of the end of 2019, the number of active buyers of Pinduoduo reached 585.2 million, with a net increase of 48.9 million in a single quarter, and a net increase of 167 million compared with the same period of the previous year.In the two quarters of Q3 and Q4 of 2019, the number of active buyers of Pinduoduo had a net increase of 102 million, and the coverage of users across the whole network and the whole territory is still growing at a faster pace.