How we check facts
Where do facts come from?
Official sources first: the National Immigration Administration, Chinese embassies, city governments, operators. When only a secondary source exists, the fact is marked "Secondary source". When we can't confirm something, the page says "Not confirmed yet" instead of guessing.
What do "Checked" and "Changed" mean?
"Checked" is the last date we confirmed the fact against its source. "Changed" is the last date the fact itself changed. We never move a date without re-checking.
Can picks be bought?
No. Sponsored rows, if we ever run them, are labelled "Sponsored" and kept out of our own picks. Some sites we recommend are commercial partners: see advertising and affiliates.