User talk:1.39.77.199

September 2020
Welcome to Wikipedia. We appreciate your contributions, but in one of your recent edits to Ma Dong-seok, it appears that you have added original research, which is against Wikipedia's policies. Original research refers to material—such as facts, allegations, ideas, and personal experiences—for which no reliable, published sources exist; it also encompasses combining published sources in a way to imply something that none of them explicitly say. Please be prepared to cite a reliable source for all of your contributions. You can have a look at the tutorial on citing sources. Thank you. — Blablubbs (talk • contribs) 11:41, 11 September 2020 (UTC)
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Please do not add or significantly change content without citing verifiable and reliable sources. Before making any potentially controversial edits, it is recommended that you discuss them first on the article's talk page. Please review the guidelines at Citing sources and take this opportunity to add references to the article. Materialscientist (talk) 11:45, 11 September 2020 (UTC)