Family Association ties, Lew Yu-tung. The cannery was located at the northeast corner of Sacramento and Stockton Streets in San Francisco and took up the first two stories of the building with the basement as storage. Lew Hing and other Family Association members lived on the third floor. In the 1880s–1890s, canning food was still a new concept. Lew Hing had embarked on a long period of trial and error before the cannery could reliably produce safe and edible canned foods. When food was not preserved properly or the cans were not fully sterilized (for example, each can had to be soldered individually by hand), noxious bacterial action would ruin the product, causing cans to swell and even explode. Eventually, Lew Hing developed safer and more effective formulas for canning various fruits and vegetables. These formulas were never documented since they were Lew Hing's trade secrets and were kept from rival canneries. Canned fruit items became a very good seller in Chinatown as many Chinese made purchases to take back to China. Soon, the products were purchased by Westerners and sales expanded outside San Francisco's Chinatown. Middle years Lew's original cannery thrived for over two decades. Then, in 1902, at age 44, he decided to close the cannery and retire to Canton. However, within a year Lew returned to the Bay Area, opening the Pacific Coast Canning Company at 12th and Pine Streets in Oakland. Always on the cutting edge of progress, Lew built his new cannery as the first concrete building in the industrial part of Oakland, plus he insisted on the most advanced machinery for mass production of his products. Also, in contrast to San Francisco, Oakland had space for a larger cannery as well as providing the Southern Pacific railroad tracks directly to the cannery dock for easy shipping of Lew's Buckskin brand canned goods throughout the United States. Products included asparagus, cherries, apricots, peaches, pears, and grapes. Tomatoes were the most popular. Always a stickler for quality, each morning, Lew would go to the Tasting Room and open, inspect, and taste batches of food processed the day before. Eventually, Buckskin canned goods would make their way throughout the Western hemisphere. In 1906, Lew Hing was able to make substantial assistance to Bay Area earthquake victims. He opened his cannery to the homeless and also provided tents elsewhere for temporary shelter. He hired cooks to provide meals.