Chinese tourists increasing in casinos in Spain

An article here in French (automatically translated here) is superficially about an increasing number of casino employees learning Chinese, but there are no numbers provided besides an "increasing number of tourists since the Chinese tourist visa program was expanded". Not that there is any reason to doubt the increasing number, but the Chinese the employees learn is most likely to be vocation-specific and not very extensive. The part at the end about the number 4 and the facing of seats (north, east, south, west) is interesting though and is true to a certain extent in Korea as well.