In the Year of the Dragon rule update

[giolleau]

The cost of the 6 yen favor that grants you 2 victory points per turn has been raised to 7 yen. Please change the rule of the game accordingly

[MaBi]

Even if the new edition has this rule change, the original one still has the 6 yuan cost and a lot of players are not even aware of this new rule. So I can't just modify the cost from 6 to 7 (which would be easy).
The right way would be to add the new rule as an option, but unfortunately that requires a lot more work, so I doubt I will ever implement it.