Regarding racist depictions in Asterix, see here. I can't find a good picture of the squinty Chinese pirate but I'm sure there's one out there.
Sure, one might claim that this racist depiction arose from ignorance and was not done out of any malicious intent, but racism born of ignorance is still racism. And I don't really hold with "that was just the way things were". As you can see from comparing the Asterix pirates with the original Barbe Rouge characters they were parodies of, it was perfectly possible to belong to Goscinny and Uderzo's generation and not draw a black man like an ink spot with large lips.
And shall I mention the story where Asterix and Obelix end up in the Americas and wind up living with stereotypical "How, white man" Plains Indians? I'll forgive the time displacement but not the geographical one. It would be like Asterix and Obelix landing in a Britain populated by Hungarians, but hey, white people are all the same anyway.
Anyway, I've skimmed through this list of female Tintin characters and the only other female I've found is Peggy Alcazar, the shrill harpy of a general's wife in Tintin and the Picaros. The absence of women is rather conspicuous with the only two examples being unpleasant and annoying creatures. Rather strange for Tintin the two-fisted punisher of spies and saboteurs not to be saving damsels, though the presence of women doesn't necessarily mean romance would have to be a plot element.
I'm suddenly remembering Tintin in Thailand, the Tijuana Bible or doujinshi showing Tintin and company getting their ashes hauled. I'm not making a crack about them looking for poon or whatever because Tintin explicitly wasn't - he's gay in the comic and only goes for the young boys. It wasn't very good, in fact it was shit but it was kind of interesting seeing sex inserted into the milieu of Tintin.