All of them, Meizhen, Renxiang, and Ling Qi, had agreed that she would be better served helping to sound out the lower status members of the delegation. It would be harder for Meizhen to really get anything out of them so she was not only helping their expedition, but also her friend.
I think this is basically the guiding interest in how I'll be voting.
This is an opportunity for us, but also Meizhen, to gain greater insights into the concerns of, and to build sympathy with if I'm reading Suzhen's intentions correctly, lower castes. A certain sympathy for the needs of the lesser castes is vital to Bai Suzhen's political project, but it's also something even she, and currently Meizhen, kind of fall short at. It was Bai Meilen who truly approached mastery of the field. Meizhen has catching up to do.
We know that Bai Suzhen's political opponent has more pull among the Green and Red castes, due to her role as general. I feel there's an edge more gain in peeking into the situation of Lao Keung, the Red caste Bai. At least in terms of broad familiarity and growth of perspective. Plus, there's a reason Bai Suzhen is personally involving herself with sponsoring a Lao for the officer track. This seems like a good opportunity to build on, for broader political stability. Not that Xia support isn't important, but it seems more secure already.
Lao Keung also seems like he could be harder to make inroads with later, because Ling Qi has less obviously in common with him. (Though parallels between their low-birth could provide interesting fodder for their interactions, after the ice is broken.)
[X] Speak of the foe beneath and her own experience delving into their uncanny realm. [Sets starting bond of Xia Anxi to 0, Lao Keung to 1]
I'm also a fan of the juxtaposition of Ling Qi being chummy with the Bai soldier, while Gan Guangli is chummy with the Bai astronomer. It's a mix-match of aesthetic which provides texture, and I think there's strong setting-building narratives to pursue on either side. Ling Qi and Lao Keung explore the nature of class/caste, mobility within it, and the structuring and reformation of society; while Gan Guangli and Xia Anxi are a surprisingly fitting duo in widening discourse on the southern solar cults, between one's sun spirit partner and the other's interest in astronomy itself.
This choice now doesn't make a friendship between Gan Guangli and Xia Anxi guaranteed by any means, but I do think it allows for greater narrative opportunity for that kind of setup.