In 1893, he attended The Industrial Exhibition held in Chicago to buy instruments and equipment for his workshop and laboratory at Tengchow College.
1893年，他前去芝加哥参观美国全国的工业展览，以便选购他在登州的工作兼研究室所需的设备。
2
After the meeting, he entered the renowned Baldwin Locomotive Works (established in 1854) in Philadelphia as a trainee for several months, so that his experience could be used in Tengchow.