Final answer:
No foreign religion became popular in China until the Six Dynasties period (220-589 AD), when Buddhism, introduced by foreign missionaries, gained widespread acceptance.
No foreign religion became popular in China until Buddhism arrived.
Step-by-step explanation:
Even though Chinese emperors had allowed foreign missionaries to open monasteries and mosques in China, no foreign religion became popular among the Chinese until the arrival of Buddhism. Buddhism originated in India and was first introduced to China via the Silk Road during the Han Dynasty. However, it did not become widely popular until the period of the Six Dynasties (220-589 AD). Its philosophical teachings appealed to the Chinese, especially in relation to the cyclical nature of life, existence, and suffering.
Learn more about Buddhism in China