Huoyi lun 豁疑論. [Tianzhu Shengjiao huoyi lun 天主聖教豁疑論] / Zhu Zongyuan 朱宗元.

See edition (Borgia Cinese 334.8) in: Tianzhujiao dongchuan wenxian sanbian 天主教東傳文獻三編, v.2.
Online edition at Hong Kong Catholic Diocesan Archives
Bibliographical citation see: Ad Dudink & Nicolas Standaert, Chinese Christian Texts Database (CCT-Database).

JapSin I, 166.c
Huoyi lun 豁疑論.
By Zhu Zongyuan 朱宗元; revised by Stanislao Torrente (Qu Dude 瞿篤德, zi 天齊, 1616–1680). One juan. Chinese bamboo paper in one volume. Reprinted by the (Jesuit church) Dayuantang 大原堂 in Guangzhou. No date of publication.

The cover bears the title and a Latin inscription: “Solutio objectionum circa | religionem christianam | a christiano Chu | Çum Yuen.”

The first folio bears the title: Tianzhujiao huoyilun 天主教豁疑論, the name of the author: 甬上朱宗元述, and of the reviser: 瞿篤德. Pfister (p. 338) erroneously attributed the authorship to Torrente, whereas the book clearly states that Zhu Zongyuan is the author. Torrente only took part as reviser.
There are seven columns in each half folio with eighteen characters in each column. The upper middle of each folio bears the title of the book. The number of the folio is given below. The text consists of eight folios. At the end of the last folio the publisher’s name reappears: 穗城大原堂重梓.
This booklet is a brief summary of Catholic teaching. It gives an explanation of the purpose of the missioners in coming to China. The treatise opens with a kind of introduction:
“I spent the early part of my life in the Land of Nod without realizing it. Then, all of a sudden I woke up and I was convinced that my fellow men are all in the same state and I felt that it would not be fair for me to let them persist in such a state. Hence I wish to share my experience with them.”

Cf. JWC 2:91–98; Fang Hao 1947, pp. 69–72; id., 1969, pp. 230–232.
Source: Albert Chan, S.J., Chinese Books and Documents in the Jesuit Archives in Rome, p. 221.