Ziyuan Xu was born in 1886, making him 55 years old in 1941 when 'Charlie Chan Breaks the Conceal Down' was released.

Warner Oland was born in 1879 and was about 52 in 1931 when 'Charlie Chan Carries On' was released.

Oland's Chan would have been the probable model on which Ziyuan Xu would have been cast in the role, although the first couple Toler films may have reached China by that time perhaps.

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Translated from...

http://www.dvd.com.cn/person/5618.html

Xu Xin Park in 1929 into the Shanghai Film Co., in 1932 the star of films by actors, the initial resistance at the Shanghai film company, in 1939 to Shanghai, China in the new, Xinhua companies such films as actor, since after the Group Theater Nanjing, the delegation Tianjin, Hankow other theatrical performances, in 1949 to Hong Kong, the company Yonghua shooting "Secrets" as role

(25 of his films are listed on this page too)

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Oh, correction please...

Ziyuan Xu is also in the cast list for 'Charlie Chan and Combatting of Enemy Overlord' (1948) and he has top billing.

I'm pretty sure that Ziyuan Xu must therefore be Shanghai's answer to Warner Oland.

... since E. L. Park was so far down the cast list, I mean

The Hong Kong Film Archive website lists 9 films starring Ziyuan Xu (or Xinyuan Xu) in its archive, but the two Chan titles are not among them...

檢索結果
9 符合檢索的題名: Xu, Xinyuan, 1886-
排序以:
設限由:

1. The soul of China
類型: [motion picture] /
出版/公映年份: 1948 [Release].
著者/製作人: Bu, Wancang, 1903-1974, 拼音. director.

2. Hero of our time
類型: [motion picture] /
出版/公映年份: 1948 [Release].
著者/製作人: But, Fu, 拼音. director. scriptwriter. producer.

3. Virtue in the dust
類型: [motion picture] /
出版/公映年份: 1949 [Release].
著者/製作人: Cheng, Bugao, 1898-1973/6/20- 拼音. director.

4. Sorrows of the forbidden city
類型: [motion picture] /
出版/公映年份: 1948 [Release].
著者/製作人: Chu, Shek-ling, 1899/9/1-1967/1/5, 拼音. director.

5. Orioles banished from the flowers
類型: [motion picture] /
出版/公映年份: 1948 [Release].
著者/製作人: Fang, Peilin, ?-1947, 拼音. director.

6. Bloodsuckers
類型: [motion picture] /
出版/公映年份: 1950 [Release].
著者/製作人: Wang Yin, 1911/6/25-1988/4/13, 拼音. director. cast.

7. Walking on thin ice
類型: [motion picture] /
出版/公映年份: 1948 [Release].
著者/製作人: Wang Yin, 1911/6/25-1988/4/13, 拼音. director. scriptwriter. cast.

8. Mysterious heroine
類型: [motion picture] /
出版/公映年份: 1949 [Release].
著者/製作人: Yam, Pang-nin, 1892-1968/2/23, 拼音. director. scriptwriter.

9. The net of divine retribution
類型: [motion picture] /
出版/公映年份: 1947 [Release].
著者/製作人: Yeung, Kung-leong, ?-1965/9/23, 拼音. director.