(1). The direct-injection pen-storage ink is an integrated design, and the refill cannot be replaced. (2), the giant energy to
write the length data for the line test, from the national light industry fountain pen ballpoint pen quality supervision and
testing center, test report number: WY-2019-049. The actual writing length will vary depending on the writing habits. (3), 50,000
words: When the average length of each line is 3cm, Xiaomi can write about 50,000 words. (4), this weight is only the reference
value, and the actual weight of each product will be slightly floating (±5%).