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The second (with only one photo) was hard to find. Here is a description from an auction:
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Stack's Bowers Galleries (& Ponterio) - August 2019 Hong Kong Auction, Lot 52334
CHINA. Reformed Government of China. Copper-Nickel 20 Fen Pattern, Year 29 (1940). PCGS SPECIMEN-62 Gold Shield. KM-Pn4; JNDA-23-1. Struck during the Japanese Occupation by the Hua Hsing Commercial Bank in Shanghai, a financial institution established by puppet authorities of the Japanese in May 1939. Struck in Nickel. EXTREMELY RARE and the first example that we have seen. Sharply struck With light attractive tone. A great rarity that is left unpriced in the JNDA book. Estimate: $18000.00=======================
My first picture corresponds to the description above. They claim it is extremely rare. Remember, for any collectible coin:
DO NOT CLEAN YOUR COIN. CLEANING RUINS VALUE.
My search found two other examples.
Second picture has a different reverse. Auction price realized was $56.