Tao Huabi found her real product by watching rivals resell her sauce

Widowed young and unable to read, Tao Huabi supported her family through a string of manual jobs before opening a bare street stall outside a Guiyang guesthouse in 1989, selling liangfen and cold noodles off two borrowed bricks and a sheet of oilcloth. She made her own chili-bean paste purely as a condiment to season the noodles, the kind of house seasoning every noodle stall in the city had its own version of and nobody thought to sell separately.

The paste turned out to be the thing customers actually came for. One day she stayed home sick and skipped her usual sauce-making; customers who showed up for liangfen left without ordering once they learned there was no sauce to go with it. Following the thread further, she noticed something stranger: nearby noodle shops she wasn't even competing hard against were doing brisk business too, because they had quietly bought jars of her paste from other vendors and were serving it as their own.

Read demand off rivals' sales: when noodle shops bought and resold her chili paste, she saw the sauce alone carried value, so she made it the sole product.

Rivals buying and reselling her sauce proved it had independent value apart from her noodles.

Customers leaving when sauce was unavailable showed it was the draw, not the noodles.

Free jars to truck drivers spread reputation and validated demand before formal distribution.

This external signal let her confidently pivot to sauce as sole product.

When unsure what customers value, look for evidence of value in others' behavior, not just your own sales.

Lao Gan Ma grew from a 40-worker back-room operation into China's best-known chili sauce brand, sold in more than 30 countries. 7 billion yuan annual output figure for 2012, which appears to measure gross production value rather than revenue and is not reconciled here.