Ah, right...but I'm not really seeing Ling Qi as making a good target unless we stay still. Considering what seems to be Sect norms, the typical challenge process goes like:
1) Hit a new level of development in some area. Variable time
2) Scope out a target for several months while you train and purchase counters to the target
3) Challenge the target, preferably with more points wagered than they can afford to refuse
Net result of about 3-4 months between challenges, with your defense getting the minimum effort that your Way and Face can justify(because theres basically no cost to losing unless you're on the brink already) in order to keep your cards hidden for your challenge. This is a good cycle, since it lets the Production students refill their project box between important challenges and just buy off lesser annoyances with their Lots Of CP from sect duties.
That reads like its almost never worth it to challenge people until they plateau out for a time, because you can't get good data on them if they are shuffling about, which means its a lot riskier.
Which basically means fast climbers like Renxiang(and Ling Qi) are rarely worth challenging .