April 4 is an ordinary day in Japan, but in China this day is the traditional festival known as Ching Ming Festival. During Ching Ming Festival, China has a 3- to 5-day holiday, so we believe it also affects companies engaged in import and export business.So today, we will introduce some information about Ching Ming Festival.
The holiday schedule in 2021 differs by region as follows.
China: 2021.4.3〜2021.4.5
Hong Kong: 2021.4.2〜2021.4.6
Taiwan: 2021.4.2〜2021.4.5
Singapore: 2021.4.2
In addition, below we list the dates and number of days for Chinese festivals other than Ching Ming Festival.

(Source: http://www.japanchina.jp/news/china-jiejiari/)
This is because during this holiday period China completely shuts down, and logistics, banks, and other businesses also stop operations. So if you have urgent delivery deadlines, it is a good idea to consider the holiday schedule in advance.
Ching Ming Festival in China is a day to visit ancestors' graves, pull weeds, and clean the graves, and it is also called the "grave-sweeping festival." It is also a day to welcome spring and take walks in the countryside, and it is also called the "outing festival." In "The Legend of the White Snake," Xu Xian and Bai Suzhen also met in the suburbs of Hangzhou, which was bustling with Ching Ming Festival celebrations. Tea leaves picked before Ching Ming Festival are called "Mingqian tea," tea leaves picked from Ching Ming to Grain Rain are called "Yuqian tea," and tea leaves picked after Grain Rain are called "Yuhou tea." In China, green tea is considered more premium the closer it is picked to Ching Ming Festival, because it has more fragrance and sweetness. In the central and southern parts of Okinawa Island (Nakagami and Shimajiri), as well as Izena Island, Iheya Island, and the Kerama Islands, it is held as "Shimi Festival." In the Okinawan dialect it is called "Shīmī" ("Ushīmī" in Shuri). In these areas, as in Chinese customs, people clean the graves and visit them, and relatives gather in a picnic-like atmosphere to enjoy meals with their ancestors at the graveside (such as mochi, pork dishes, sweets, fruits, and so on). The Shimi Festival is sometimes introduced as the equivalent of "Obon" outside Okinawa Prefecture, and although its folk and religious significance differs, it is a similar custom. In areas where the Shimi Festival is not held (the Amami Islands, the northern part of Okinawa Island (Kunigami and Ie Island), Kume Island, and the Sakishima Islands), "Jūrokunichi Festival" (the 16th day festival, the 16th day of the first lunar month) or the Lunar Tanabata (the 7th day of the 7th lunar month) is held instead. (Source: wikipedia)