Who did Song Renzong send to invite the real Zhang Tianshi?

Song Renzong sent Hong Xin to Longhu Mountain in Xinzhou, Jiangxi Province, and invited Zhang Tianshi to Beijing to eliminate the epidemic. This story comes from the first time in The Water Margin by Shi Naian, a novelist in the Ming Dynasty, that is, Zhang Tianshi prayed for the plague, and Qiu Hong mistakenly left the demon (Zhang Tianshi prayed for the eradication of the plague, and Qiu Hong mistakenly released the demon).

The background of the story comes from the reign of Emperor Song Renzong. Jiayou took part in politics (deputy prime minister) on March 3, three years, saying that the plague was prevalent now. He hoped that the emperor could reduce taxes, pardon some guilty people and pray for God to eliminate the plague. Song Renzong's son of heaven ordered Hong Xin to go to Longhu Mountain as a special envoy to find Zhang Tianshi.

Extended data:

Outlines of the first story of Water Margin;

Captain Hong was ordered to go to Longhu Mountain in Xinzhou, Jiangxi Province, and announced that the real person had gone to the DPRK and suffered a _ _ _ _ plague. I don't want to meet a big snake and a tiger on the way up the mountain (neither snake nor tiger hurt him). Later, he rode an ox and told Hong Taiwei that he had gone to North Korea to eliminate the epidemic.

After handling official business, Hong Taiwei went down the mountain accompanied by the abbot of the Shangqing Palace in Longhu Mountain and swam to the "enchanting magic hall" of the Shangqing Palace. The owner said it was where the town demon lived and refused to open it. Relying on his own power, Hong Xin forced the abbot to open the "uber's house", and as a result, he let go of the thirty-six highest day stars and seventy-two earth stars that were suppressed in the temple, and the one hundred and eight stars became the heroes of the water margin later.

Baidu Encyclopedia-Zhang Tianshi prayed for the plague, and Tai Wei Hong mistakenly left the demon