From this point, there was no alliances in East Asia can stop the mighty Song army. Their president continue to expand on adjacent enemies and minor states and making and annexing vassals. Pasai, Yan, Yue, Mong Yang, Korea, Xi… were losing land to Song. Below is some of the screenshot and results of these easy wars.
With the Conquest of Luoyang, one of the holy site of Buddhism, Song received an extra missionary, it was nice although Eastern religion can truly get long with Humanism ideas.
And here’s the time lapse for this achievement run.